--- product_id: 327373336 title: "Kaldness K1 50 Litre Bag" brand: "evolution aqua" price: "₨204429" currency: LKR in_stock: true url: https://www.desertcart.lk/products/327373336-kaldness-k1-50-litre-bag store_origin: LK region: Sri Lanka --- # self-cleaning via air-driven movement 500cm² surface area per m³ for bacteria 50L dynamic bio-media volume Kaldness K1 50 Litre Bag **Brand:** evolution aqua **Price:** ₨204429 **Availability:** ✅ In Stock ## Summary > ♻️ Elevate your pond’s ecosystem with the self-cleaning K1 media—where science meets effortless purity! ## Quick Answers - **What is this?** Kaldness K1 50 Litre Bag by evolution aqua - **How much does it cost?** ₨204429 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/327373336-kaldness-k1-50-litre-bag) ## Best For - evolution aqua enthusiasts ## Why This Product - Trusted evolution aqua brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Superior Surface Area:** Provides 500cm² of colonization space per m³, creating an optimal habitat for beneficial bacteria to thrive and purify water. - • **Universal Compatibility:** Seamlessly integrates with all pond filters, including Evolution Aqua’s EazyPod and Nexus systems for versatile use. - • **Self-Cleaning Innovation:** Forget tedious maintenance—K1’s unique movement displaces old bacteria, keeping your filter at peak performance effortlessly. - • **Maximize Filter Efficiency:** Boost your pond’s health with media that actively circulates, enhancing bacterial colonization and filtration power. - • **Robust Ammonia & Nitrate Removal:** Engineered to accelerate nitrification, effectively eliminating harmful toxins and ensuring crystal-clear pond water. ## Overview The Evolution Aqua Kaldness K1 50 Litre Bag is a high-performance bio-media designed for pond filtration systems. Its unique wheel shape and near-neutral buoyancy enable continuous movement within filters, promoting a self-cleaning effect that maximizes beneficial bacterial growth. With 500cm² of surface area per cubic meter, it efficiently removes ammonia and nitrate, enhancing water quality without maintenance. Compatible with all pond filters, including Evolution Aqua’s EazyPod and Nexus, this 50L media supports up to 250g of daily fish food load, making it ideal for professional and hobbyist pond keepers seeking reliable, low-maintenance filtration. ## Description Kaldness K1 50 Litre Bag ## Features - Helps to remove ammonia and nitrate - Can be used in all types of pond filters - Increases efficiency of filters - Can be used in moving bed filter systems - High surface area to allow for more bacteria to colonise. Perfect for use with Evolution Aqua EazyPod and Nexus filters.. Provides 500cm2 of Surface Area for every 1m3 of K1 media used ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Evolution Aqua | | Part number | MEDIAK1/50 | | Item Weight | 250 g | | Package Dimensions | 56.79 x 52.6 x 30.6 cm; 250 g | | Item model number | MEDIAK1/50 | | Size | 50L | | Color | Aqua | | Style | Submersible | | Material | Plastic | | Power source type | Corded Electric | | Item Package Quantity | 1 | | Batteries Included? | No | | Batteries Required? | No | ## Product Details - **Brand:** Evolution Aqua - **Colour:** Aqua - **Material:** Plastic - **Style:** Submersible - **Power source:** Corded Electric ## Images ![Kaldness K1 50 Litre Bag - Image 1](https://m.media-amazon.com/images/I/31qdbhhByfL.jpg) ## Questions & Answers **Q: Is this real evolution aqua k1? i bought media advertised as k1 on amazon & it's bigger than the real k1 i already have so it's a knock off.** A: Thanks for your question! Anything sold as Evolution Aqua K1 Media ought to be the authentic material, so I sympathize with you that you received an inferior item. While I cannot speak for every seller on this listing, we purchase directly from Evolution Aqua USA, so you can be confident that what we offer is the genuine media. — Steve at Practical Garden Ponds, 484-237-2080 **Q: is this 25 or 50 liters? and how much many bags would it take to fill a 55 gal barrel?** A: This listing is for 50 liter. How much it would take to fill a 55 gallon barrel partly depends on how tightly you want to fill it. If you are making a moving bed, the secret to success is that it is loose and can move. Liquid to liquid, there are about 208 liters in a 55 gallon drum, but it would require less than that to do it loosely. Feel free to call with additional questions. Sincerely, Nate at Practical Garden Ponds 484-237-2080 option 1 **Q: how many pounds of the K1 media is in this 50 liter bag?** A: Hello joe, thanks for asking! There are roughly 14 Lbs in a 50L K1 Media Bag. I hope this is helpful! Dana at Practical Garden Ponds, 484-237-2080, ext.1 **Q: I have a sand filter for my (small) pond. Can I replace sand with this material? Does this material have a longer life than sand?** A: Thank you for your interest. There is more difference between a quality Pond Filter and a sand filter than just the media. The laterals in a sand filter have very small perforations so that the sand does not escape. Therefore, with a sand filter, even if you replace the sand with a good quality "bead filter media" your filter will still clog more frequently with dirty pond water than you will likely appreciate. It would be well worth your while in the long run to buy a K Plus Pressure Filter with all of the arts to begin with. Filters and the laterals in them are designed for different medias and different flow rates etc. You can make your own filter and use one of many medias but your results will be less predictable and won't come with engineering specifications that you can count on. Results will vary. Sincerely, Nate at Practical Garden Ponds 484-237-2080 ## Frequently Bought Together - Evolution Aqua K1 Biological Filter Media - 50L, Black, Plastic, Submersible, Aquarium Biological Filter Media - 1 1/2" UNISEAL Flexible Tank Adapter (bulkhead) - 6 Pack - 2'' UNISEAL Flexible Tank Adapter (bulkhead) - 6 Pack --- ## 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.lk/products/327373336-kaldness-k1-50-litre-bag](https://www.desertcart.lk/products/327373336-kaldness-k1-50-litre-bag) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-05-17*