【COMPLETE SET】GOZILLA fish filters box Set designed to fit perfectly with the 16W 1000L/H turtle tank low water level filter (Product Asin: White color B0DK13PPCK & Black color B0DK1HK2BL in store). Package contains 3 pack filter boxes, which you can replace when it run out in the filter. These filter sets are only compatible with specific filters. If you already have a filter, please measure its size before purchasing to ensure compatibility. 【DUAL FILTRATION DESIGN】Features filter ceramic bio-balls and biochemical sponge dual filtration, effectively purifying water while reducing the frequency of water changes. 【FILTRATION PERFORMANCE】The mesh sponge efficiently captures debris, fish waste, food residue, plant leaves and fine particles, keeping your aquarium environment clean and healthy. 【REGULAR MAINTENANCE】For optimal performance and extended lifespan, it is recommended to replace the filter cartridges every 2-4 weeks, ensuring reliable operation.(It depends on the number of creatures in tank) 【EASY INSTALLATION】Turn off and remove the used cartridge and flush the new cartridge under cool clean water to remove dust. After rinsing, insert the cartridge into the flushing chamber and make sure the filter cartridge fits completely into the chamber. 109 filter box