Feature: 1. Do not place the filter down, because it will block and affect the filtering effect. 2. Maintain a clean water environment-unclean water tanks are harmful to the lives of your farm animals. Say goodbye to the trouble of constantly changing muddy water tanks. The water purifier cube is a super absorbent activated carbon block that can keep drinking water clean. Let our fish grow up healthy and happy. 3. Materials used-the water purifier cube adopts honeycomb-shaped super-absorbent activated carbon blocks, which can effectively help filter dirt, turbidity, and odors in the livestock trough. Solid content, no powder, no impurities. 4. Caution for use-use after rinsing, do not put down the black mesh cloth, otherwise the mesh cloth will be clogged, please rinse or replace the filter every 3 to 6 months. Description: Name: Filter Material: activated carbon Color: Black Size: Small 10x10x5cm/Large 10x10x10cm Applicable occasions: fish tanks, aquariums, etc. Packing list: 1 x Filter Note: Honeycomb activated carbon is made of mold and is fragile due to the porous honeycomb design. Therefore, when receiving the goods, there may be some missing corners or detachment on the edge, which is a normal phenomenon and does not affect the use function. If you have received a damaged product, please contact us and we will reissue it for you.