Features:

This Fish Tank Biochemical Filter Sponge can be used in sea water tank， fresh water tank， aqua-plant tank. The size can be cut freely as you need.

Thickening Biochemical Filter Sponge， tough and durable.

Good shading features， can reduce the algae breeding.

Moderately hole， can cultivate high density nitrifying bacteria.

Strong filterability， can stable water quality and reduce fish died.

Can be used repeatedly after cleaning.

Suggested to clean it every month.

Color: black

Size: Approx 50x50x2cm (L*W*H)

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Package included:

1Pcs Aquarium Filter Sponge