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Originally Posted by pwoller  No fish at all. Only coral. I removed the biowheels, just useing it as a fuge and place for the purigen, carbon and a little mechanical filtration. If I dont get a skimmer, what parameters should I watch carefully for a problem? Basically what does the skimmer keep in check? | If you decide to not have any fish, then I really dont see the need for a skimmer b/c your refugium will take care of the filtering. As with all reef tanks, you should look for Cal, Alk/Dkh, Mag, Ph, Nh3/4, No2, No3 and salt. The skimmer takes most, in not all, the organics out of the water. Waste, uneaten food. _________ 9YR OLD 90G/55g custom sump/refug Mag18 Aquac 180skimmer 692w MH AC jr,yel&kole tang,midas&convict blenny,B&G chromies,Blk/yel fin chromie blackcap,nemo,neon goby,6line; Blastomussa Merleti,Acan ,BUBBLE,Torch,LTA, Acropora(2) Moon, assort zoas, yel& G star polyps, P&B ricordia, montiporas, cup&candy corals, xenias,B/G mush,flower ane(2), cherry red mussa, dusters,cleaning crew..  |