Rectangular sponge for filter No. 1, coarse, 4 x 4.5 x 11 cm, blue

A rectangular large -porous sponge for filter No. 1 is designed to remove large particles and mechanical impurities from water in the aquarium. It has large pores, which allow you to easily delay large particles and prevent them from entering the aquarium.

made of foam rubber and porous plastic. It must be installed inside the filter. Water, passing through the sponge, is filtered from mechanical impurities, and pure water returns to the aquarium.

you need to periodically clean or replace the sponge to maintain filtering efficiency.

the diameter of the hole is 13 mm.