Aquaforest AF Filter Floss is a soft, high-loft polyester filter wool that traps fine particulate and debris as water passes through it, polishing your aquarium until it sparkles. It is a simple, inexpensive way to add mechanical filtration to almost any setup, fresh or salt. Stock up on more filter media and browse the full Aquaforest lineup. Features Fine mechanical filtration. Dense polyester fibers capture suspended debris, uneaten food, and detritus for noticeably clearer water. Fits almost anywhere. Cut or pull it to size for sumps, hang-on-back filters, canister filters, and overflow boxes. Fresh or saltwater. Inert and safe for freshwater, planted, and reef aquariums alike. Easy to replace. Swap it out regularly to keep filtration efficient and stop trapped waste from breaking back down into the water. How to Use Tear or cut the floss to fit your filter chamber and place it where water flows through it, ideally before your biological and chemical media so it catches debris first. Rinse lightly or replace as it loads up with gunk. For the cleanest water, replace the floss rather than reusing it once it is heavily soiled. Specifications Brand Aquaforest Type Mechanical filter media (polyester floss) Use with Sumps, HOB, canister, and overflow filters Water type Freshwater and saltwater Recommended Pairings Biological and chemical filter media to round out your filtration The rest of the Aquaforest reef and aquarium care range Frequently Asked Questions Can I use it in a reef tank? Yes. Filter floss is inert and works great in reef sumps to polish water. Just replace it often, since trapped waste can raise nitrate and phosphate if left too long. How often should I change it? It depends on your bioload, but many hobbyists swap or rinse it every few days to a week. Change it as soon as it looks dirty or flow starts to slow. Where should it go in my filter? Place it first in the flow path so it catches debris before water reaches your biological and chemical media.
