This biochemical filter cotton can improve the water quality then reduce the fish mortality. 

Features:
Use this filter cotton， can improve water quality.
Best effect， reduce the fish mortality.
The size can be cut freely.
Can be reused after cleaning. 
Suitable for seawater， fresh water， water tanks.

Specifications:
Color: White / Blue / Green (Random)
Material: Sponge
Size: Approx. 90 * 30 * 2cm / 35.4 * 11.8 * 0.78in (L * W * H)
Weight: Approx. 127g / 4.49oz

Note:
The color is sent randomly， please in kind prevail.

Package List:
1 * Filter Cotton