This MicroPad Self Cut filter sponge is ideal to add a layer of very fine media into your filter. This measures at 25.4cm x 45.7cm, so provides plenty of surface area to suit most filter systems, and you may get several pieces for smaller filters.
The MicroPad is a very fine tight structure, and is perfect for removing particles from the water, even very small ones. This can be used continuously, or just added as required, say after new gravel is added, or disturbed, and there are very fine particles within the tank.
This MicroPad is suitable for coldwater, tropical and marine use, just cut how you need!