I've got 4 Eheim canister classics laying around I dont know what do with lol. My 30g reef could def. use a sump for more water volume, Thought a 10g would work fine. Would save me money on the return pump.
you think I could get a decent price for them? 2 of them are bran new in a box. (Friend of mine had a pet store that went under and gave me a bunch of fish stuff)