Why you Need a Pre-Filter Sponge for Your Aquariums
Why You Need a Pre-Filter Sponge for Your Aquariums Are you looking for an easy and cost-effective way to optimize hang-on-back or canister filters? Pre filter sponges (or intake sponges) are a simple way to optimize your hang-on-back (HOB) or canister filter. This foam cylinder is simple and has a hole at the center that …