HomeFishTetra FilterActive Water TreatmentTetra FilterActive Water Treatment 100mlby Tetra Pets Club PriceEasy Repeat100% progress of 100%Product detailsPets Club PriceEasy RepeatVolume100mlOne time£4.42(£44.20/l)Regular price£5.89(£58.90/l)Pets ClubEasy Repeat£4.42(£44.20/l)Regular price£5.30(£53.00/l)Price match promiseSave 25% on selected Tetra Treatments & Food*Pets Club. Free to join, easy to saveUnlock exclusive Pets Club prices and offers - Find out more10% off your first shop, plus hand-picked rewardsSign in/ Sign upQuantityAdd to basketLoading...Click & CollectLoading...Loading...Loading...Home DeliveryLoading...Loading...Frequently bought togetherLoading...Loading...Loading...Loading...Loading...Loading...Loading...Product descriptionPromotes biological activity, accelerates pollutant degradation, optimises filter cleaning, and maintains balanced aquarium for fish wellbeing.Restores natural bacteriaBreaks down pollutantsReduces sludgeKeeps filter cleanerTetra FilterActive restores the natural bacteria levels within your tropical aquarium which are lost during water changes and filter cleaning. Tetra FilterActive contains living starter bacteria which settle within the filter in your aquarium and work to break down nitrite and ammonia, which are harmful to fish, to maintain a healthy biological balance. This formula also contains sludge-reducing, cleaning bacteria which help to keep the filter cleaner for longer by accelerating the biological decomposition of pollutants and waste. This helps improve the performance of your filter and keep it cleaner for longer. Tetra FilterActive can also be used to support the biological activity in the aquarium, when new fish are added or where water is heavily contaminated due to a large number of fish.Features:Restores natural bacteria levels - Maintaining a healthy biological balance for the fishBreaks down harmful pollutants - Reducing the risk of harm to the fish and ensuring water qualityReduces sludge and keeps the filter cleaner - Improving filter performance and longevitySupports biological activity in the aquarium - Aiding in establishing and maintaining a stable and healthy aquatic ecosystemSuitable for: Tropical aquariums.Not suitable for: Coldwater aquariums and marine aquariums.Approximate Dimensions (Product):100ml: H12.2 x W5.5 x D3cm Product code: 7119737Not what you're looking for? Check out our full Water Maintenance rangeRead moreAbout the brandSince their foundation in 1951 by Dr Ulrich Baensch, Tetra have paved the way with research and innovation in aquatics and home fishkeeping, with a passion and fascination for fish at their core. They remain committed to making natural, species-appropriate care as easy as possible. Proudly made in Germany, with industry leading research and development, they develop innovative products made to the highest standard. As the number one fish food brand in the world, Tetra is the trusted name for all your aquatic care needs.Looking for more? Check out our full Tetra rangeIngredientsCompositionNitrifying bacteriaInstructionsHow to use:Shake well before use. Add 5 ml per 20 l of aquarium water after changing or cleaning the filter. 1 section on the measuring scale = 10 ml. Use half dosage after water changes.Offer Terms & ConditionsSave 25% on selected Tetra Treatments & FoodThe promotion is available in Pets at Home stores & onlineThis promotion is valid until midnight on 14th July 2026Pets Club Prices and Offers are available only to Pets Club members. Not available on guest checkout. Sign into your account to redeem. T&Cs apply.Full Terms & Conditions applyPrice Match Promise Explained:You always get the best price with Easy Repeat. So for this order, your Easy Repeat price has been matched to a limited-time promotional price of £4.42.Post price match promise for Easy Repeat:10% when you choose home delivery. 10% when you choose Click and Collect.
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