Aquarium Filter Sponge, Aquarium Filter, 1mx20cm Aquarium Filter Mat, Aquarium Filter Foam Bio Filter Mat

【SPECIAL MATERIAL】 The aquarium filter sponge is made of high-quality natural cotton fibers, is soft, durable, and can be washed multiple times without deforming.

【Mechanical Filtration】 The filter mats effectively trap dirt, leftover food, waste, and other impurities from the water.

【Environmental Protection and Safety】 Effectively prevents waste, reduces fish mortality and the use of chemicals in filtration, and increases oxygen solubility in aquariums and fish tanks.

【Multi-Layer Filtration】 The filter wool is divided into three layers: basic filtration, pre-filtration, and fine filtration. The dense fiber mesh at the bottom traps even the finest particles, ensuring crystal-clear water in your aquarium. [NOTE] This product is vacuum-packed. Upon opening, the sponge will be slightly creased and not completely flat, but will regain its normal shape after some time and expand more quickly in water. You may need to trim it; please note the creases before purchasing.