--- product_id: 48451818 title: "Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria, to support biological activity in aquarium, extend cleaning intervals & improve filter performance, 250ml" brand: "tetra" price: "€ 23.26" currency: EUR in_stock: true reviews_count: 13 category: "Tetra" url: https://www.desertcart.sk/products/48451818-tetra-filteractive-bacteria-mix-of-live-starter-bacteria-and-sludge store_origin: SK region: Slovakia --- # extends filter cleaning intervals biological sludge reduction 250ml potent liquid formula Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria, to support biological activity in aquarium, extend cleaning intervals & improve filter performance, 250ml **Brand:** tetra **Price:** € 23.26 **Availability:** ✅ In Stock ## Summary > ♻️ Keep your aquarium thriving with nature’s own filter booster! ## Quick Answers - **What is this?** Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria, to support biological activity in aquarium, extend cleaning intervals & improve filter performance, 250ml by tetra - **How much does it cost?** € 23.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/48451818-tetra-filteractive-bacteria-mix-of-live-starter-bacteria-and-sludge) ## Best For - tetra enthusiasts ## Why This Product - Trusted tetra brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sludge-Busting Power:** Naturally breaks down fish waste and organic buildup, keeping filters cleaner longer. - • **Stress-Free Fish Care:** Supports biological activity especially after water changes or adding new fish, ensuring a happy, healthy tank. - • **Crystal Clear Water, Always:** Liquid formula is easy to dose and won’t cloud your aquarium’s pristine look. - • **Turbocharges Aquarium Health:** Replenishes essential live bacteria lost during cleaning to maintain perfect water balance. - • **Effortless Maintenance Upgrade:** Extends filter cleaning intervals, giving you more time to enjoy your aquatic oasis. ## Overview Tetra FilterActive is a 250ml liquid bacterial mix designed to restore and maintain the biological balance in aquariums. It contains live starter bacteria that break down harmful ammonia and nitrite, plus sludge-reducing bacteria that naturally clean filters and reduce maintenance frequency. Easy to use and 100% biological, it supports healthier fish and clearer water, making it a must-have for any aquarium enthusiast. ## Description Product Description Tetra FilterActive contains a mix of living starter and sludge-reducing cleaning bacteria. Some important bacteria are lost through the regular cleaning an aquarium requires. Tetra FilterActive rebalances bacteria lost when the water is changed or the filter is cleaned. Tetra FilterActive contains living starter bacteria that settle in the filter on the filter material and maintain the biological balance in the aquarium. These nitrifiers are important for breaking down nitrite and ammonia, which are harmful to fish. This product provides immediate support for the biological activity in the aquarium. Tetra FilterActive also contains sludge-reducing cleaning bacteria that keep the filter cleaner for longer with their natural action. They accelerate the biological decomposition of organic pollutants such as fish waste, built-up sludge, food remains and dead plant materials. This improves the filter’s performance and extends the intervals between cleaning. It also promotes bioactivity in the substrate and prevents decay. This helps to keep the aquarium inhabitants happy and healthy and reduces the maintenance the aquarium needs. Tetra FilterActive contains natural bacterial cultures and is 100% biological. Its liquid formula is very easy to use and does not cloud the water. It can also be used to support the biological activity in the aquarium when new fish are added or the water is heavily contaminated due to a large number of fish. Directions Shake well before use, then add 5 ml of product to 20 litres of water after replacing or cleaning the filter. Reduce the dosage by half after a water change. Review: Great product - Definitely helps to keep my aquarium cleaner and my fish look much more healthy. Review: Seems to work and great price - Tanks a bit overpopulated, and although my 307 canister can handle it, the prefilter sponges do get a bit clogged up. Since using this I have noticed a bit less gunk so I guess it works.no issues with my fish when using it. Decent price so can't complain really. ## Features - Warning:Not suitable for children under 10 months. - Accelerates degradation of pollutants like ammonia and nitrite - Value for money - Good product with good quality ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00MBEFGUM | | Best Sellers Rank | 854 in Pet Supplies ( See Top 100 in Pet Supplies ) 8 in Aquarium Water Treatments | | Brand | Tetra | | Brand Name | Tetra | | Country Of Origin | Germany | | Customer Reviews | 4.6 out of 5 stars 11,835 Reviews | | Global Trade Identification Number | 04004218247079 | | Item Form | Liquid | | Item Weight | 0.28 Kilograms | | Item form | Liquid | | Item weight | 0.28 Kilograms | | Liquid Volume | 250 Millilitres | | Liquid volume | 250 Millilitres | | Manufacturer | Spectrum Brands | | Manufacturer Part Number | 247079 | | Model Number | 247079 | | Pet Type | Fish | | Target Species | Fish | | Unit Count | 250.0 millilitre | | Unit count | 250.0 millilitre | ## Product Details - **Brand:** Tetra - **Item form:** Liquid - **Item weight:** 0.28 Kilograms - **Liquid volume:** 250 Millilitres - **Manufacturer:** Spectrum Brands ## Images ![Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria, to support biological activity in aquarium, extend cleaning intervals & improve filter performance, 250ml - Image 1](https://m.media-amazon.com/images/I/71foNwDsJ8L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can This Be used for marine aquariums?** A: States suitable for all Freshwater Aquariums so I don't believe it is suitable for marine **Q: Does this help stop brown algae?** A: No. It aids your filtration system after clean ups and water changes. **Q: I added it to the water but realise now should add to filter, can i do a second dose the day after?** A: It shouldn’t really matter as it would soon be pumped around the tank best put all in anyway if your starting a new tank once cycled start of very slowly as it 6 to 12 months to fully cycle an aquarium add clean up crew first **Q: Do I need to add a couple of fish as well to help maintain the bacteria I'm putting in please?** A: There are 2 or 3 options when using this you need ammonia in the water for the good bacteria to feed on. So you could put some very hardy fish in there to produce waste as in there poo and pee which would create Ammonia for your bacteria to feed on or you could put a few flakes of food in the water which would break down and create Ammonia or thirdly you could put pure Ammonia in the water which the good bacteria would feed on. I normally just put a bit of food in the water its the best way of starting the cycle without the risk of harming any of your fish. You could also look at Prime conditioner and Prime stability make sure you test the water often it still takes time even when using this product be patient good luck. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by H***! on 9 July 2026* Definitely helps to keep my aquarium cleaner and my fish look much more healthy. ### ⭐⭐⭐⭐⭐ Seems to work and great price *by M***K on 6 July 2026* Tanks a bit overpopulated, and although my 307 canister can handle it, the prefilter sponges do get a bit clogged up. Since using this I have noticed a bit less gunk so I guess it works.no issues with my fish when using it. Decent price so can't complain really. ### ⭐⭐⭐⭐⭐ Good for the money *by E***Z on 27 June 2026* Great product ## Frequently Bought Together - Tetra FilterActive Bacteria- mix of live starter bacteria & sludge-reducing cleaning bacteria, to support biological activity in aquarium, extend cleaning intervals & improve filter performance, 250ml - Tetra AquaSafe to Turn Tap Water into Safe and Healthy Water for Fish and Plants, 500 ml - Tetra AlguMin - Quickly Combats All Types Of Algae In The Aquarium, Prevents The Growth Of New Algae, 250 ml --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/48451818-tetra-filteractive-bacteria-mix-of-live-starter-bacteria-and-sludge](https://www.desertcart.sk/products/48451818-tetra-filteractive-bacteria-mix-of-live-starter-bacteria-and-sludge) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-07-21*