Designed to effectively trap fine particles, Marina Polywool filter material keeps aquarium water clear and prevents filter clogging. Suitable for fresh or salt water aquariums, this non-toxic media polishes water and makes it ultra clear. Ideal for use in clip-on, canister and corner filters. Net Weight: 40 g (1.4 oz)

Other sizes available :
Marina Polywool, 15 g (0.5 oz)
Marina Polywool, 100 g (3.5 oz),