This pre-filter or intake sponge is an easy-to-install foam cylinder that easily slides onto the intake tube of hang-on-back (HOB) and canister filters.
Such filters often have large openings that can easily draw in large objects that can damage the motor, so the pre-filter sponge effectively prevents small creatures, such as baby fish, dwarf shrimp, and snails, as well as plant leaves, fish food, and other debris from getting into the filter.
An intake sponge offers a vast area to promote the growth of beneficial bacteria which purify the water of contaminants, creating an optimal living habitat for your fish. Its mechanical filtration also increases the lifespan and performance of the filter media.
Size: 1.5 diameter, 3” height, .75” interior diameter. Fine grain sponge.