GandB Aquarium Sponge Filter Foam 17-7x17-7x0-98 - Water Bio Block Biochemical Media Pads

When you receive your roll of 17.7 inch by 17.7-inch filter pad, simply cut it to your custom desired size and they are ready to use. It can also be used as a prefilter if desired. Perfect for the DIY aquarist! Advise: Best effect, reduce the fish mortality. This product is suitable for sea water tanks, fresh water tank, water plants cylinder, the size of the free cut. Its multi-porous feature will avoid blockages and provide the largest adhesion area for bacteria. Secret hole clearance and softness is most suitable to cultivate a hotbed of good nitrifying bacteria through expert analysis.