Questions and answers

Frequently asked questions

Quickly and easily find the right answers to your questions relating to JUWEL products. Our "question and answer database" contains useful tips and answers to frequently asked questions. Start by selecting a topic at the bottom and quickly find the information that you need.

Common


  • How long is my warranty for items from JUWEL Aquarium?

    Our warranty period for all parts of the aquarium is 2 years from the purchasing date. Filter sponges and fluorescent tubes T5/T8 as well as all components that are subject to normal wear, e. g. the impeller of the pump, are excluded from the warranty. The basis for the warranty is the availability of a valid proof of purchase.

Aquarium/Cabinet


  • Should I use a mat between the cabinet and the aquarium?

    The JUWEL aquarium features a safety base frame which ensures an even distribution of the weight. Please do not use a mat under any circumstances!


  • How do I start up my aquarium correctly?

    Arrange the aquarium in accordance with the instructions for use and assemble the filter. In this context, please make sure that the filter media are positioned correctly, e.g. as this is also shown on the packaging of the filter display box. Remove all plastic bags that might protect the filter media (carbon sponge, filter floss, Nitrax sponge and optional Cirax/Phorax basket). If you wish to glue a background or a filter cover into your aquarium, this is the best time. Then load the aquarium with the ground material and the plants as well as other decorative elements, e.g. stones and roots. After that, fill the aquarium with water. Tip: It is best to carefully pour the water through the filter in order to protect the existing set-up. Run the aquarium without fish for approx. 10 days in order to let the important bacteria form in the filter sponges and clear the water of pollutants. Use bioBoost to activate new filter media faster, and thus shorten the run-in period of your aquarium. Use the advice of your specialist retailer.


  • How long is my warranty for items from JUWEL Aquarium?

    Our warranty period for all parts of the aquarium is 2 years from the purchasing date. Filter sponges and fluorescent tubes T5/T8 as well as all components that are subject to normal wear, e. g. the impeller of the pump, are excluded from the warranty. The basis for the warranty is the availability of a valid proof of purchase.


  • Which aquarium do I have?

    On current models, you will find your aquarium’s model name on the support beam. The model can also be specified based on the aquarium’s shape and width. Our service team will be happy to help you with this.


  • Can my aquarium be produced in customised dimensions?

    Our production is geared towards producing complete aquariums. Unfortunately we are not able to consider any special requests with regard to our equipment. This is not possible, due to the fact that our manufacturing process is only suitable for serial production.


  • How long is the service life of my aquarium?

    Unfortunately we are not able to make any general statements about an aquarium’s service life, as this depends on a wide range of different factors. However, we do have customers who have been using their aquariums for more than 20 years without any problems.


  • What is the maximum weight I can fill into my JUWEL aquarium?

    Thanks to specially developed float glass, JUWEL aquariums can bear a multiple of their filled weight. Please make sure, however, to observe your base cabinet’s load capacity. For details about the maximum load capacity, please see the technical data provided on our website.

T5/T8 Lighting


  • Is the lighting dimmable?

    Unfortunatly our T5 light units are not dimmable.


  • Do I generally need reflectors?

    We recommend the use of reflectors for T5 and T8 fluorescent tubes for two reasons: Reflectors increase the illumination by 100% which is particularly positive, especially in case of plant aquariums. In addition, they serve in a very convenient manner as a visor which simplifies the maintenance of the aquarium a great deal. All steps in the aquarium may be performed in a more successful and comfortable manner under full illumination. LED light units (such as the MultiLux LED, NovoLux LED, HeliaLux LED, HeliaLux Spectrum) do not require reflectors. The LED light units are already optimally adjusted to the aquariums and they have an ideal beam angle.


  • Can the T5 and T8 fluorescent tubes be switched on individually?

    As the plants prefer stable light conditions, the lighting cannot be switched on in different steps.


  • What is the spectrum of my T5/T8 fluorescent tubes or my LED lighting media?

    The spectrum of the T5/T8 fluorescent tubes or the LED lighting media is printed on the respective packaging and you can also find it in the image gallery on the product page.


  • What is special about the T5 HiLite compared to the T8 fluorescent tube?

    As the commercially available standard T5 tubes were only developed for general room illumination purposes, the lighting technology had to be adapted to the common aquarium dimensions in order to ensure the complete illumination over the entire length of the aquariums. As a result, we are able to completely illuminate the entire area of our aquariums with lengths of 60, 80, 100, 120 and 150 cm with high illumination.


  • How often should the socket rings be replaced?

    To ensure waterproofness of your JUWEL aquarium light unit, we recommend that the fitting rings are replaced once a year. When using a T8 or T5 light unit, the fluorescent tubes should also be replaced on this occasion.


  • What is special about the MultiLux LED compared to the T5 HiLite fluorescent tube?

    The MultiLux LED features a higher light intensity while saving up to 50 % of energy compared to conventional T5 technology. Further advantages of the MultiLux LED include a longer service life of the LED tubes, and durable light quality compared to T5 fluorescent tubes.


  • How often should I replace my T5/T8 fluorescent tubes?

    The T8 fluorescent tubes should be replaced every 10 to 12 months, to ensure the tubes’ luminosity. The HiLite T5 fluorescent tube should also be replaced every 10 to 12 months, with the exception of the HiLite Marine and the HiLite Blue. Those two models should be replaced more frequently, every 6 to 8 months.


  • Can I convert my HiLite T5 light unit with T5 HiLite fluorescent tubes to LED operation, by inserting LED tubes?

    It is not possible to replace a T5 HiLite fluorescent tube with an LED tube. The MultiLux light units may look identical, however, they feature different integrated control units for the fluorescent tubes’ ignition voltage. Each control units is designed for the specific light unit. If you would like to change to LED operation, you should buy a designated MultiLux LED light unit or a HeliaLux light unit. Both products are a perfect match for your aquarium and they are quick and easy to install.


  • Which fluorescent tube lighting options do I have for my saltwater aquarium?

    If you are using a MultiLux T5 light unit in your aquarium, JUWEL Aquarium recommends using the fluorescent tubes HiLite T5 Marine and HiLite T5 Blue. Both lighting media are designed to recreate the lighting conditions of a coral reef and they specifically promote the growth of your corals. The HiLite T5 Marine with its brilliantly white 14,000 Kelvin light provides for bright conditions, while the HiLite T5 Blue creates fascinatingly deep blue tones.

LED Lighting


  • Do I generally need reflectors?

    We recommend the use of reflectors for T5 and T8 fluorescent tubes for two reasons: Reflectors increase the illumination by 100% which is particularly positive, especially in case of plant aquariums. In addition, they serve in a very convenient manner as a visor which simplifies the maintenance of the aquarium a great deal. All steps in the aquarium may be performed in a more successful and comfortable manner under full illumination. LED light units (such as the MultiLux LED, NovoLux LED, HeliaLux LED, HeliaLux Spectrum) do not require reflectors. The LED light units are already optimally adjusted to the aquariums and they have an ideal beam angle.


  • What is the spectrum of my T5/T8 fluorescent tubes or my LED lighting media?

    The spectrum of the T5/T8 fluorescent tubes or the LED lighting media is printed on the respective packaging and you can also find it in the image gallery on the product page.


  • How often should the socket rings be replaced?

    To ensure waterproofness of your JUWEL aquarium light unit, we recommend that the fitting rings are replaced once a year. When using a T8 or T5 light unit, the fluorescent tubes should also be replaced on this occasion.


  • What is special about the MultiLux LED compared to the T5 HiLite fluorescent tube?

    The MultiLux LED features a higher light intensity while saving up to 50 % of energy compared to conventional T5 technology. Further advantages of the MultiLux LED include a longer service life of the LED tubes, and durable light quality compared to T5 fluorescent tubes.


  • Can I convert my HiLite T5 light unit with T5 HiLite fluorescent tubes to LED operation, by inserting LED tubes?

    It is not possible to replace a T5 HiLite fluorescent tube with an LED tube. The MultiLux light units may look identical, however, they feature different integrated control units for the fluorescent tubes’ ignition voltage. Each control units is designed for the specific light unit. If you would like to change to LED operation, you should buy a designated MultiLux LED light unit or a HeliaLux light unit. Both products are a perfect match for your aquarium and they are quick and easy to install.


  • What is the standard lighting system integrated in the model series Lido LED, Rio LED, Vision LED and Trigon LED?

    Each JUWEL aquarium of the model series Lido, Rio, Vision and Trigon is equipped with a MultiLux LED comprising an LED DAY and an LED NATURE as standard. This provides for brilliant lighting and excellent plant growth. The replaceable tubes create an optimum light spectrum, while saving up to 50% of energy compared to conventional T5 light units. While the LED DAY highlights your animal and plant world with its bright and stimulating light, the LED NATURE provides for a warm and natural light that promotes photosynthesis of your plants and brings out the green tones in your aquarium.


  • What is the standard lighting system that is integrated in all Primo LED aquariums?

    The Primo series features a NovoLux LED White as standard. This light unit is particularly energy efficient and it meets the requirements for operating an aquarium. In order to increase the satisfaction of your individual requirements, you can upgrade your aquarium by placing up to three NovoLux LED lamps in the cover.


  • How often should I replace my LED tubes?

    LED lighting media have a longer service life than conventional fluorescent tubes. The NovoLux LED, MultiLux LED, HeliaLux LED and HeliaLux Spectrum have a 2 year warranty from the date of purchase.


  • How can I add more light to my Primo aquarium?

    The Primo series features a NovoLux LED White as standard. You can upgrade your aquarium’s light system by placing up to three NovoLux LED lamps in the cover. In addition to the NovoLux LED White that provides for attractive lighting and promotes the well-being of your fish and plants, you are able to highlight the red and blue tones of your aquarium using the additional light units NovoLux LED Red and NovoLux LED Blue. The additional lamps can be simply attached to the cover, using the included clips. The NovoLux LED can furthermore be operated with a suitable controller. Sunrise, sunset and the duration of dimming can be programmed individually.


  • Is the lighting dimmable?

    The MultiLux LED that is installed in the factory (from 2017) is not dimmable. By switching to the HeliaLux system (LED or Spectrum) combined with HeliaLux SmartControl you are able to implement individual daily sequences and dimming curves.


  • What is special about the HeliaLux Spectrum compared to the MultiLux LED?

    The HeliaLux Spectrum is a specially developed full-spectrum LED with maximum performance. Special red, green and blue LEDs have been employed in the HeliaLux Spectrum to create intense colours and maximum contrast. They cover the full spectrum and are ideal for supplementing the light-intense white 9000K and 6500K LEDs. When combined with the HeliaLux SmartControl, they enable you to adjust the lighting conditions in your aquarium to meet your requirements. In addition to sunrises and sunsets, you can easily programme lighting phases.


  • Is the HeliaLux Spectrum also suitable for saltwater operation?

    The HeliaLux Spectrum is only suitable for use in fresh water aquariums. It is not suitable for saltwater aquariums. We recommend the MultiLux LED with the LED lighting media Marine and Blue to provide for ideal conditions in saltwater aquariums.


  • Can I also use the HeliaLux LED/HeliaLux Spectrum in aquariums from other manufacturers?

    The UniversalFit holder allows for the HeliaLux LED / HeliaLux Spectrum also to be used in aquariums from other manufacturers.


  • Which LED lighting options do I have for my saltwater aquarium?

    Each JUWEL aquarium of the model series Lido, Rio, Vision and Trigon is equipped with a MultiLux LED comprising an LED DAY and an LED NATURE as standard. JUWEL Aquarium offers two further LED tubes for your saltwater aquarium that you can use by simply replacing the existing LED tubes. Both the LED MARINE and the LED BLUE are designed to recreate the lighting conditions of a coral reef and they specifically promote the growth of your corals. The LED MARINE with its brilliantly white 14,000 Kelvin light provides for bright conditions, while the LED BLUE creates fascinatingly deep blue tones.

Filtering


  • What is the design of the filter?

    The circulating pump of the JUWEL inside filter pulls the water from the upper and lower water layers of the aquarium into the filter. Due to the special construction of the filter, the water passes from the top to the bottom through the filter media which greatly simplifies the filter maintenance. The filter media are: The white poly pad as mechanical pre-filter. Tip: It absorbs the rough dirt and prevents the other filter media from clogging quickly. The replacement is realised in a simple, quick manner and ensures the full functionality of the system. The black carbon sponge binds chemical contaminations. The green Nitrax sponge contains special micro-organisms that break down nitrate and consequently counter the growth of algae. The blue coarse filter sponge represents the biological filter stage I. Separation of the water flow Part 1 of the filtered water is directly returned to the aquarium through the riser of the pump. Part 2 of the filtered water moves to the “second” filter stage of the biological “slow filter”. Cirax, the white basket with the filter ceramics, filters with a large surface under aerobic (= oxygen-enriched) conditions. The blue, fine-pored filter sponge represents biological filter stage I which operates in a strong manner under anaerobic (= oxygen-deficient) conditions. After that, the water that has been filtered repeatedly flows back into the aquarium.


  • How does the JUWEL filter system function?

    The JUWEL inside filter "Bioflow" is a biologically operating aquarium filter. The filters are adapted to the respective aquarium volume in an ideal manner: The capacity of the filter pump is designed for twice or 3 times the throughput per hour (e. g. Rio 180 = 180 litres at 600 l/h pump capacity). Thanks to its great volume, the filter features extensive backup capacity and it has a long service life (e. g. fewer maintenance intervals). The JUWEL inside filter is equipped with various filter media that facilitate biological pollutant degradation performance. The dual flow principle: A unique feature of the JUWEL inside filter is the dual flow principle in the models Bioflow M, L and XL. The water passes through the two high volume filter blocks at different speeds. This additionally optimises the biological filter process. Scientifically tested: The JUWEL filter system has successfully been tested with regard to its effectiveness in scientific long-term tests by independent institutes a number of times. All JUWEL inside filters are designed with extensive backup capacity, guaranteeing optimised filtering for top water quality. Users appreciate the inside filter’s ease of use and built-in safety: The water stays inside the aquarium!


  • What is the best way to clean the JUWEL filter?

    It goes without saying that the manner and the frequency of cleaning the JUWEL filter depend on the individual conditions. Our recommendations to clean or replace the media are based on average experience: Replace the white poly pad on a weekly basis. Replace the black carbon sponge approx. every month if needed. Replace the optional Carbax filter basket after approx. 2 months. Replace the green Nitrax sponge every 2 months. Replace the blue, coarse-pored filter sponge after approx. 3 months. Replace Cirax filter baskets with ceramics after approx. 12 months, Phorax after approx. 2 weeks and Amorax after approx. 3 months. Replace the blue, fine-pored filter sponge after approx. 9-12 months. Important: For safety reasons, always disconnect all devices that are operated in the water from the power grid during the filter maintenance. Never replace all blue filter media at the same time. Check the water level in the filter at regular intervals; if the water level drops, the media will need to be replaced due to the fact that they are clogged and prevent the water from flowing through them.


  • Where do I insert Cirax into my existing filter?

    We recommend inserting Cirax at the top spot in the lower filter insert.


  • What is an impeller?

    The impeller is the rotor equipped with a magnet in the pump. It should be replaced every 12 months in order to ensure operating quietness.


  • Is it possible for the filter or pump capacity to decrease?

    If the filter media have been clogged, the water quantity passing through the filter is reduced. The water level in the filter slowly begins to drop. The capacity of the pumps is designed in such a manner that they have sufficient reserves. Tip: Check the water level in the filter housing every week, when replacing the filter floss. If it dropped in comparison to the water surface of the aquarium, carefully flush the upper filter media or replace them.


  • Which filter system do I have?

    You may find the respective information in the instructions for use in the aquarium passport. If you have misplaced your aquarium passport, you are able to access the file “compatibility chart” in our download area. Based on the size of your filter media, you are then able to identify the filter system used in your aquarium. Please feel free to contact our customer service for assistance.


  • How do I identify a Bioflow filter?

    The pump is arranged next to the filter media in the intake chamber of the filter housing. Advantage: Free access to the filter media simplifies the filter maintenance!


  • Which pump may I insert into my filter?

    With the exception of the Bioflow 1500 that may be installed in the filter Bioflow 8.0 only, you may insert all JUWEL pumps into each filter. Simply keep in mind for pumps 280 and 1500 that they do not fit into the Bioflow filter. And conversely the pumps Bioflow 280 and 1500 do not fit into the filters Compact, Standard or Jumbo.


  • Why is my pump so noisy?

    There may be various different reasons, if your pump is unpleasantly noisy. Please check that your pump is positioned correctly, and make sure to observe the 6 to 8 week run-in period when taking your Bioflow filter into service. To ensure optimised functionality and running smoothness for your pump, we recommend that the pump is cleaned on a regular basis, and that wear parts such as the impeller and axle along with the rubber bearings, are replaced every 12 months.


  • When should I use the optional filter media?

    In addition to the filter media fitted at the factory, JUWEL Aquarium offers a range of additional filter media. 1. When newly setting up or replacing your other filter media, we recommend using the filter booster bioBoost that immediately activates the new filter media and accelerates the filtration performance in your aquarium. 2. If your aquarium shows increased ammonium values, you should used our filter medium “Amorax”. It quickly and effectively binds ammonium, prevents the formation of ammonia and promotes the vitality of your fish. 3. If you perceive odour formation in your aquarium, or if the water changes in colour, you should use the filter medium “Carbax”. 4. The filter medium “Cirax” provides an even greater surface for filter bacteria to settle, than the fine filter sponge bioPlus, and it thus provides for a consistent filtering effect in your aquarium. 5. If your aquarium shows increased phosphate values, you should use our filter medium “Phorax”. This medium removes phosphates from your aquarium, and it effectively reduces algae growth and promotes improved plant growth.


  • Where do I insert bioBoost, Carbax, Amorax, Cirax and Phorax in my filter?

    "BIOFLOW M/L/XL: bioBoost should be placed directly underneath the filter floss. We recommend that Carbax is used in the upper filter insert, between bioCarb and Nitrax. Amorax, Cirax and Phorax should be placed at the top of the lower filter insert. BIOFLOW SUPER: bioBoost should be placed directly underneath the filter floss. Carbax, Amorax, Cirax and Phorax can be used in the upper part of the filter basket, instead of the Nitrax sponge. Please refer to our change flyer in the download centre for information about the exact placement of our filter media."


  • Can the Bioflow filter that is installed at the factory also be used for saltwater aquariums?

    Yes, the Bioflow filter is also suitable for saltwater aquariums. For the optimised operation of a saltwater aquarium you will also need the JUWEL SeaSkim and a ceramic axle for the pump in the inside filter. The JUWEL SeaSkim contains a low-noise and powerful Eccoflow SeaSkim 1500 pump that ensures the formation of extremely fine bubbles and therefore guarantees effective protein skimming in your saltwater aquarium.


  • Do I need to adjust my filter media for operating a saltwater aquarium, or are the filter media fitted at the factory just as suitable for saltwater use?

    The filter media filter floss, carbon sponge, fine filter sponge and coarse filter sponge that are fitted at the factory can also be used for saltwater aquariums. The optional filter media such as Amorax, Carbax, Cirax and Phorax are also suitable for saltwater aquariums. The filter booster bioBoost and the nitrate remover Nitrax, on the other hand, should be used for fresh water aquariums only.

Decoration


  • Which material is used for JUWEL backgrounds and filter covers?

    All JUWEL backgrounds and filter covers are made of highly condensed polyurethane and coated with epoxy resin. This complex production process makes it very easy to cut the colour backgrounds to size whilst providing an extremely tough, colourfast surface.


  • Are JUWEL decorative items suitable for saltwater?

    All decorative items from JUWEL Aquarium are suitable for saltwater.


  • What is the correct way to cut JUWEL backgrounds and filter covers to size?

    Filter covers can be cut precisely to size using the enclosed template. Backgrounds must be cut to the dimensions of the aquarium. Videos about how to correctly cut the JUWEL decoration elements are provided in the image gallery for the respective product on our website.


  • What tool do I use to cut JUWEL backgrounds and filter covers?

    All backgrounds and filter covers come with a suitable saw. This allows you to precisely cut your JUWEL background and filter cover to size.


  • How do I correctly install the structured backgrounds in my aquarium?

    Once you have cut the background to size, you should attach it using a specially developed glue. JUWEL Conexo is an extremely effective glue and is particularly suited for permanently attaching plastics to glass. JUWEL Conexo can also be used on moist surfaces. Videos about how to correctly install the JUWEL decoration elements are provided in the image gallery for the respective product on our website.


  • How do I correctly mount the posters to my aquarium?

    You should use a specially developed glue for mounting your poster. JUWEL PosterFix guarantees air-bubble-free mounting of the film background on your aquarium. This special glue also prevents unattractive light refraction, thus increasing the colours and structure of your motif to great effect.


  • How many backgrounds do I need for my aquarium?

    You will find this information both on the packaging of our JUWEL aquarium backgrounds, and in the image gallery for the respective product on our website.

Accessories


  • What is the difference between the automatic feeder EasyFeed and the new SmartFeed?

    Every JUWEL aquarium is already equipped for easy installation of an automatic feeder by JUWEL. The EasyFeed can be programmed for two feeding cycles a day, and allows you to feed your fish at intervals of six hours. JUWEL Aquarium has developed the SmartFeed to allow for more comfortable feeding with a more comprehensive range of functions. This automatic feeder can be programmed for three feeding cycles a day with 8 different dosing levels. The integrated display facilitates programming and provides for an overview of your settings. Two conveyor screws for flake and granulate feed are included, so you can adjust your automatic feeder to your type of feeding. A feed chamber extension is also included, to allow for automatic feeding during even longer periods of absence.


  • What is the difference between the ground material and filter cleaner AquaClean and the new AquaClean 2.0?

    Both models are ideal tools for cleaning your JUWEL inside filter and the ground material of your JUWEL aquarium. The AquaClean works by means of the Quickstart system, that transports the water flow and dirt into a bucket by means of a shaking motion and without any inconvenient suction. The AquaClean 2.0 has been revised, and the previously used Quickstart system has been replaced by the Easy Start System. Simple, repeated squeezing of the pump activates the water flow immediately.

Saltwater


  • Are JUWEL decorative items suitable for saltwater?

    All decorative items from JUWEL Aquarium are suitable for saltwater.


  • Is the HeliaLux Spectrum also suitable for saltwater operation?

    The HeliaLux Spectrum is only suitable for use in fresh water aquariums. It is not suitable for saltwater aquariums. We recommend the MultiLux LED with the LED lighting media Marine and Blue to provide for ideal conditions in saltwater aquariums.


  • Which LED lighting options do I have for my saltwater aquarium?

    Each JUWEL aquarium of the model series Lido, Rio, Vision and Trigon is equipped with a MultiLux LED comprising an LED DAY and an LED NATURE as standard. JUWEL Aquarium offers two further LED tubes for your saltwater aquarium that you can use by simply replacing the existing LED tubes. Both the LED MARINE and the LED BLUE are designed to recreate the lighting conditions of a coral reef and they specifically promote the growth of your corals. The LED MARINE with its brilliantly white 14,000 Kelvin light provides for bright conditions, while the LED BLUE creates fascinatingly deep blue tones.


  • Which fluorescent tube lighting options do I have for my saltwater aquarium?

    If you are using a MultiLux T5 light unit in your aquarium, JUWEL Aquarium recommends using the fluorescent tubes HiLite T5 Marine and HiLite T5 Blue. Both lighting media are designed to recreate the lighting conditions of a coral reef and they specifically promote the growth of your corals. The HiLite T5 Marine with its brilliantly white 14,000 Kelvin light provides for bright conditions, while the HiLite T5 Blue creates fascinatingly deep blue tones.


  • Can the Bioflow filter that is installed at the factory also be used for saltwater aquariums?

    Yes, the Bioflow filter is also suitable for saltwater aquariums. For the optimised operation of a saltwater aquarium you will also need the JUWEL SeaSkim and a ceramic axle for the pump in the inside filter. The JUWEL SeaSkim contains a low-noise and powerful Eccoflow SeaSkim 1500 pump that ensures the formation of extremely fine bubbles and therefore guarantees effective protein skimming in your saltwater aquarium.


  • Do I need to adjust my filter media for operating a saltwater aquarium, or are the filter media fitted at the factory just as suitable for saltwater use?

    The filter media filter floss, carbon sponge, fine filter sponge and coarse filter sponge that are fitted at the factory can also be used for saltwater aquariums. The optional filter media such as Amorax, Carbax, Cirax and Phorax are also suitable for saltwater aquariums. The filter booster bioBoost and the nitrate remover Nitrax, on the other hand, should be used for fresh water aquariums only.