Skimming?

boxcar182

New member
Is there such thing as over skimming? I have a 55 gallon tank that i will be downsizing to a 20 high. My sump for my 55 is a 20high with a octopus 150 skimmer ( rated for 150 gallon). My question is can i use my sump and skimmer on the 20high or will the the skimmer be overkill?
 
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