IceCap 4" Filter Sock w/ Plastic Ring

Icecap Reef Sump Felt Filter Bag with Plastic Ring Filter bags are used as a effective first stage of an aquariums filtration process and should be placed so that water coming from the tank filters into the filter sock first removing uneaten food, detritus, organic waste, dust and other small particulates from aquarium water. This dramatically improve water quality and reduce maintenance on pumps, reduced sump cleaning and less impact on the biological filtration by removing the excessive waste that would otherwise break down in the system. The routine use and rotation of filter socks will help reduce ammonia and nitrate producing organic waste from accumulating.