Lmfao,,,yo u mad funny dude doesnt it look like that,,na i need to id if not throwing it away,if i cant use it,,,damn dlo your every where
cocoa puffs.
+1if you aren't positive what it is, then its a little nuts to use it in your tank.
+1 for bio. my dad had tons of these laying around they are the bio part for eheimTHose are for Eheim canister filters. I have them in my filter.