Round Shape Natural Volcanic Rock Aquarium Filter Media 1/3/5Pcs High Efficiency Water Purifier for Fish Tank Aquarium

Description: 1/3/5 Pack Round Natural Volcanic Rock Aquarium Filter Media | Boost Biological Filtration & Stabilize Water Quality for Freshwater and Saltwater Aquatic Tanks Features: 1. Premium natural volcanic rock comes with dense interconnected micropores, offering super large colonization space for beneficial nitrifying bacteria. It efficiently breaks down harmful ammonia, nitrite and leftover organic waste in your tank, keeps water crystal clear and cuts down your water change frequency drastically for fish keepers. 2. Loaded with natural mineral trace elements, this volcanic filter media slowly releases beneficial nutrients into the water and maintains a steady pH level without sudden swings, creating a healthy, suitable habitat for all types of fish, shrimp and aquatic plants to support their healthy growth. 3. High-density volcanic rock has extremely stable physical and chemical properties: it won’t crumble, turn into powder or leach harmful substances even after long-term immersion in water. You can reuse it after a simple rinse, which saves your long-term filter media replacement costs greatly. 4. Its porous internal structure allows smooth water flow without clogging your filter chamber, effectively improves the overall working efficiency of your aquarium filtration system, and ensures consistent, reliable filtering performance even for long-term use. 5. Unique round shape allows these volcanic rock pieces to stack stably with even gaps between each piece, making full use of your filter bin’s internal space and ensuring even water distribution across the filter layer, maximizing the filtration efficiency of per unit filter media. Specifications: Category: Aquarium Filter Media Material: 100% Natural Volcanic Rock Size: As shown in product images Color: Reddish Brown Application: Fits all aquarium filtration systems including canister filters, trickle filters, sump tanks, upper filters, works perfectly for both freshwater and saltwater fish tanks, shrimp tanks and planted aquariums Quantity Options: 1Pc / 3Pcs / 5Pcs Note: 1. Please allow minor size deviation due to manual measurement, thanks for your understanding. 2. Actual color may slightly differ from the image due to different monitor display settings. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.