--- product_id: 26731342 title: "Pond Matrix, 20 L / 5.3 gal." brand: "water garden oasis" price: "5808 kr" currency: NOK in_stock: true reviews_count: 8 category: "Water Garden Oasis" url: https://www.desertcart.no/products/26731342-pond-matrix-20-l-5-3-gal store_origin: NO region: Norway --- # Ultra-high porosity for max biofiltration 1 L treats 100 US gallons 20 L high-capacity substrate Pond Matrix, 20 L / 5.3 gal. **Brand:** water garden oasis **Price:** 5808 kr **Availability:** ✅ In Stock ## Summary > 🌿 Transform your pond into a thriving aquatic oasis with Pond Matrix! ## Quick Answers - **What is this?** Pond Matrix, 20 L / 5.3 gal. by water garden oasis - **How much does it cost?** 5808 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/26731342-pond-matrix-20-l-5-3-gal) ## Best For - water garden oasis enthusiasts ## Why This Product - Trusted water garden oasis brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Value Power:** 20 L volume supports large ponds with minimal flow resistance - • **High Surface Area:** Porous granules provide superior biofiltration compared to bio-balls - • **Maximize Pond Health:** Efficiently removes ammonia, nitrate & nitrite for crystal-clear water - • **Clean Soil Alternative:** Cultivate aquatic plants without messy muddy soils - • **Long-lasting Performance:** Durable substrate that maintains filtration efficiency indefinitely ## Overview Pond Matrix is a 20-liter high-porosity biofiltration substrate designed to remove harmful ammonia, nitrate, and nitrite from decorative ponds. It doubles as a clean soil replacement for aquatic plants, treating 100 gallons per liter, ensuring a healthy environment for fish and plants alike while maintaining excellent water flow. ## Description Pond Matrix is a high porosity product designed to provide exceptionally efficient biofiltration for the removal of ammonia, nitrite, and nitrate from decorative ponds, thereby promoting a healthy environment for both fish and aquatic plants. Pond Matrixcan also serve as a clean soil replacement, allowing the culture of aquatic plants without the use of muddy soils. This product is sold by volume, cited weight is minimal weight. Review: Great value, top shelf product. - Awesome stuff, you can tell just by looking and holding the rocks that they are incredibly porous. I built my own custom sump and threw a whole bucket of this stuff in it, I can't even imagine how many bio-balls I would need to get the same surface area. For bio-filtration I can't think of anything that can out do this stuff. I'm pumping 2000 GPH through my sump and the water flow does not seem to be affected. Great value for 5 lbs compared to the prices for the smaller containers. Review: Works amazing - This is some of the best stuff out there. You still have to cycle your tank just like with any other product but once you do this stuff is golden and lasts forever. ## Features - High capacity biofiltration aquatic plant substrate - High porosity product designed to provide exceptionally efficient biofiltration - Removes ammonia, nitrate, and nitrite from decorative ponds thereby promoting a healthy environment for both fish and aquatic plants - Also serves as clean soil replacement allowing the culture of aquatic plants without the use of muddy soils - 1 Liter treats 100 US gallons ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001JKAK50 | | Allergen Information | Allergen-Free | | Best Sellers Rank | #748,141 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #970 in Pond Filtration Equipment | | Brand | Water Garden Oasis | | Brand Name | Water Garden Oasis | | Customer Reviews | 4.3 out of 5 stars 40 Reviews | | Global Trade Identification Number | 00000116211109 | | Item Form | Granules | | Item Type Name | Pond | | Item Weight | 22.4 Pounds | | Liquid Volume | 20 Liters | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer Part Number | 2111 | | Model Number | 2111 | | Pet Type | Fish | | Target Species | Fish | | UPC | 000116211109 | | Unit Count | 676.3 Fluid Ounces | ## Images ![Pond Matrix, 20 L / 5.3 gal. - Image 1](https://m.media-amazon.com/images/I/715EVBt-NOL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great value, top shelf product. *by M***A on November 3, 2013* Awesome stuff, you can tell just by looking and holding the rocks that they are incredibly porous. I built my own custom sump and threw a whole bucket of this stuff in it, I can't even imagine how many bio-balls I would need to get the same surface area. For bio-filtration I can't think of anything that can out do this stuff. I'm pumping 2000 GPH through my sump and the water flow does not seem to be affected. Great value for 5 lbs compared to the prices for the smaller containers. ### ⭐⭐⭐⭐⭐ Works amazing *by M***K on July 9, 2019* This is some of the best stuff out there. You still have to cycle your tank just like with any other product but once you do this stuff is golden and lasts forever. ### ⭐⭐⭐⭐⭐ This is Seachem Matrix in large *by P***N on March 29, 2021* I have a 300gal aquarium and a 95gal sump. I love the regular Matrix but I had an issue in may setup. 3600gal of water is flowing from top trough the stack of 8l of regular Matrix. The bacteria will produce so much gas in one hour to hinder the flow though the stack. Water flows beside the stack and it will limits the flow. This stuff is bigger then the biggest junk in the regular Matrix. This fixes my flow issue even with 20l in the stack. I'm very happy. --- ## 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.no/products/26731342-pond-matrix-20-l-5-3-gal](https://www.desertcart.no/products/26731342-pond-matrix-20-l-5-3-gal) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-18*