Ah, well good answer. I've never used one myself. I have a 46gal with 20gal sump. It's more of a fuge, got plant alge and a little rubble. It also holds my skimmer and heater. Got 80lbs LR
in the tank and everything is doin great. They are having troubles keeping any coral alive, shrimp and crabs live though. It sounds like they are pretty beneficial if you clean them. How do I make a wet/dry in my sump and what do they do?