--- product_id: 387922946 title: "Bacteria - Formulated for Large s, Water Features and Safe for Koi - Gallon" brand: "pond worx" price: "€ 159.61" currency: EUR in_stock: true reviews_count: 5 category: "Pond Worx" url: https://www.desertcart.sk/products/387922946-bacteria-formulated-for-large-s-water-features-and-safe-koi store_origin: SK region: Slovakia --- # Immediate activation on application Safe for koi and aquatic life Concentrated formula for large ponds Bacteria - Formulated for Large s, Water Features and Safe for Koi - Gallon **Brand:** pond worx **Price:** € 159.61 **Availability:** ✅ In Stock ## Summary > 💧 Clear water, happy koi—pond perfection starts here! ## Quick Answers - **What is this?** Bacteria - Formulated for Large s, Water Features and Safe for Koi - Gallon by pond worx - **How much does it cost?** € 159.61 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/387922946-bacteria-formulated-for-large-s-water-features-and-safe-koi) ## Best For - pond worx enthusiasts ## Why This Product - Trusted pond worx brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Synergistic System:** Works best when combined with other Pond Worx products to maintain a balanced, healthy water column. - • **Aquatic Life Friendly:** Formulated to be completely safe for koi, fish, plants, and wildlife—no harm guaranteed. - • **Effortless Application:** Simply pour along the shoreline—no complicated steps or downtime for pond use. - • **Powerful Concentration:** Designed specifically for large ponds and water features to tackle sludge and algae buildup efficiently. - • **Instant Ecosystem Boost:** Activates immediately to break down muck and sludge, restoring water clarity fast. ## Overview Pond Worx Bacteria is a concentrated liquid treatment formulated for large ponds, koi ponds, and water features. It instantly activates to break down sludge, algae, and organic debris into odorless gases, improving water clarity and oxygen levels without harming fish or plants. Easy to apply and safe for recreational use immediately after treatment, it supports a balanced aquatic ecosystem and works best when paired with other Pond Worx products. ## Description Ornamental water gardens and ponds are enclosed ecosystems, sometimes factors like fish load, uneaten fish food, leaves, sludge and unwanted debris may disrupt the balance. Leaves, grass clippings, algae, uneaten fish food, fish waste, and decaying plants all contribute to build-up of sludge which is not only unsightly, but unhealthy, as it consumes oxygen. Pondworx activates immediately and will begin to break down muck and sludge into an odorless gas that will simply escape out of the water column unnoticed. Review: Works for home koi pond - My small koi pond was full of algae due to direct sunlight for more than 10 hours a day. Despite 2 UV lamps algae still cover 70% of the sides and base. 2 weeks after applying Pondworx the base and sides began to clear up to 40% and the aeration pumps also became more vigorous! Bought second bottle already! Review: It works - highly recommended - My garden has a very large natural pond which unfortunately had a problem with biofilm. I used the full container of PondWorx Pond Bacteria and the following day the pond was much improved; a couple of days on and the pond has greatly improved and the water is clear. I can actually see the fish again, which by the way are unharmed. I would definitely recommend and will continue to use periodically or should the pond have another problem with biofilm. Depending on the size of your pond it could become expensive, however this works. ## Features - Once applied, Pondworx will instantly get to work - This concentrated formulated is designed for large ponds but also works great in water gardens, koi ponds and other water features - Treated bodies of water may be used for recreation, fishing, and other activities immediately after applying - Pondworx Products are designed to work in conjunction with each other to provide best results to promote a healthy water column and maintain an ideal ecosystem for your body of water - Easy to Use: Just pour directly from the container in several spots along the shoreline.Will not harm vegetation, fish or wildlife when used as directed ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01H7G6UG2 | | Best Sellers Rank | #15,311 in Pet Supplies ( See Top 100 in Pet Supplies ) #8 in Pond Care & Water Treatment | | Brand | Pond Worx | | Brand Name | Pond Worx | | Customer Reviews | 4.2 out of 5 stars 3,584 Reviews | | Item Form | Liquid | | Item Weight | 8.39 Pounds | | Item form | Liquid | | Item weight | 8.39 Pounds | | Liquid Volume | 128 Fluid Ounces | | Liquid volume | 128 Fluid Ounces | | Manufacturer | Pond Worx | | Manufacturer Part Number | 46 | | Model Number | 46 | | Pet Type | Fish | | Target Species | Fish | | UPC | 768980600046 | | Unit Count | 1 Count | | Unit count | 1 Count | ## Product Details - **Brand:** Pond Worx - **Item form:** Liquid - **Item weight:** 3.81 kg - **Liquid volume:** 128 Fluid Ounces - **Unit count:** 1 Count ## Images ![Bacteria - Formulated for Large s, Water Features and Safe for Koi - Gallon - Image 1](https://m.media-amazon.com/images/I/81wbCHuzsDL.jpg) ## Questions & Answers **Q: How much product do I need?** A: One gallon of Pond Worx Pond Bacteria will treat one acre with an average depth of 4-6 feet deep. **Q: Is Pond Bacteria safe for fish?** A: Yes! When used as directed, Pond Worx Pond Bacteria does not pose risk to fish, vegetation, people, pets, or other various wildlife. **Q: How long before I see results?** A: Though Pond Bacteria starts working immediately, it can take up to 90 days for measurable results, depending on the extent of the buildup. **Q: When should this product be applied?** A: Pond Bacteria works best in warmer waters. We recommend starting applications in the spring when water temperatures are at least 50˚F or above. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works for home koi pond *by M***Y on 7 October 2021* My small koi pond was full of algae due to direct sunlight for more than 10 hours a day. Despite 2 UV lamps algae still cover 70% of the sides and base. 2 weeks after applying Pondworx the base and sides began to clear up to 40% and the aeration pumps also became more vigorous! Bought second bottle already! ### ⭐⭐⭐⭐⭐ It works - highly recommended *by A***E on 24 September 2021* My garden has a very large natural pond which unfortunately had a problem with biofilm. I used the full container of PondWorx Pond Bacteria and the following day the pond was much improved; a couple of days on and the pond has greatly improved and the water is clear. I can actually see the fish again, which by the way are unharmed. I would definitely recommend and will continue to use periodically or should the pond have another problem with biofilm. Depending on the size of your pond it could become expensive, however this works. ### ⭐⭐⭐⭐⭐ Hungry little bacteria *by R***D on 4 December 2025* This bacteria works great. I start using it in the spring and before long, maybe a couple of months all the sludge in the bottom of the pond is just gone. If you want to accelerate the process, I noticed if you add an air hose to the area it works even faster ## Frequently Bought Together - PondWorx Pond Bacteria - Formulated for Large Ponds, Water Features and Safe for Koi - Gallon - Blue Lake and Pond Dye - One Gallon of Professional Lake & Pond Dye - Treats Up to 1 Acre - Royal Blue Color - Safe for Fish, Wildlife, Pets & Children - Pondworx Water Clear - Concentrated Formulation Improves Water Clarity and Quality, Helps Clear Cloudy Water, Safe for Fish, Pets, and Plant - 1 Gallon --- ## 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/387922946-bacteria-formulated-for-large-s-water-features-and-safe-koi](https://www.desertcart.sk/products/387922946-bacteria-formulated-for-large-s-water-features-and-safe-koi) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-05*