I have an extra 10g tank I want to put on a stand beside my main tank and use as a refugium. I want to drill the side of it higher than the top of the main tank, and overflow the fuge back into the main via a bulkhead and pvc. I'll use a small powerhead to pump from the main to the fuge. Does anyone have any suggestions as to what size bulkhead/pipe to use for the overflow from the fuge, and pump line from the main tank. What size powerhead should I use (if I use a maxijet or minijet?) I drew out a simple diagram of what I'm thinking of.