What kind of snails, hermits, etc will eat red slime algae? Since I upgraded my lights to MH my tank is covered. I have plenty of water circulation, very lightly stocked, and I dont think I overfeed, I also do regular water changes.....but my nitrates are still around 20 so I guess this is the problem. Even with the addition of a skimmer the nitrates dont seem to ever drop. Im planning to change the CC substrate to a DSB if I can ever find the right sand around here. I havent had any luck at Home Depot stores in Tennessee. What else can I do???? Oh yeah, I always use RO/DI water too so It cant be that. What about a hang on type of refugium? I dont have much room to do a big fuge under the tank. If I do the hang on type, how would I light it? Sorry for the long post im just getting VERY frustrated!!!!