Safe for aquarium use ?

[SandNukka15]

What would you suggest exactly rhen?

 

[Danh]

I got some filter floss on amazon pretty cheap. The felt, though is a much better idea. I am only using the floss initially until I get my second sump installed in line with felt filter socks. The felt pads are the same material as the socks. They aren't quite as effective but almost.