Do I need one more power head??

It depends on what you're keeping. If your just keeping softies and some LPS than that should be enough. Probably one more would be better. For sps I would say at least two more.
 
holy smokes Yote when did you change your avatar...O.o

i miss the mount hehe

also dont mean to hijack but since your on the subject of powerheads, would a koralia 3 be too much flow in my 10G?
 
holy smokes Yote when did you change your avatar...O.o

i miss the mount hehe

also dont mean to hijack but since your on the subject of powerheads, would a koralia 3 be too much flow in my 10G?

That would be a turnover of 105 times per hour. That would be alot, but I guess you can't have too much flow?
 
A K3 in a Nano would have your sand everywhere but on the bottom. That is a small tank, I'd go with a pair of Koralia Nano powerheads.
 
i run 2 koralia 6s in my 37 gallon one on each side, and my fish and corals love it, i only have problems if i buy frags on shells because it blows the away
 
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