Cotton packaging needs to be squeezed. The outer packaging may be crushed and damaged during transportation, but it will not affect the use. Please be careful if you mind.

This product is suitable for fresh water, sea water, aquarium, the size can be freely loaded and cut.

Dense hole gap and softness, suitable for compensation for the hotbed of nitrified bacteria.

Biochemical sponge can decompose excrement and feed residue, improve water quality, filter and clean, and have good effect.

Specification: 60X40cm thick 0.5CM