Sell Biological Filter Cotton for Aquarium (Washable) best price

Biological Filter Cotton For Aquarium 2 Layers Fresh and Salt Water 32cm x 11.5cm Cycle Used for trickle filters, sump filters, hob filters, top filter boxes, canister filters, and many more! Dimensions: 32cm x 11.5cm x 4cm Bio Cotton Uses/Functions: 1. This product is suitable for a seawater cylinder, freshwater cylinder, and water straw cylinder. The size can be cut freely. 2. The clearance and softness of the pores are suitable for the breeding of excellent nitrifying bacteria by expert analysis. 3. Biochemical cotton can break down waste and feed residue, improve water quality filtration and cleaning, and reduce fish mortality. 4. Clean water once a month, not obstructed, not deformed, can be reused after cleaning, can be used continuously.