I'm setting up a 25 gallon reef. I'm not new to saltwater but I'm trying to build my own sump. My over flow is a 1" bulkhead at the top of the tank. I wanted to use a 10 gallon for my sump but it won't fit in the cabinet. So I went with a 5.5 gallon for my sump. I have a protein skimmer in the sump. I plan on using a filter sock into the first chamber with the skimmer. The next camber I was going to have rumble rock. The problem is my pump. My pump produces more gph then the bulkhead can handle. I put in a ball valve so I could cut it back. But I don't want to cut it to far. Will that be ok? Should I drill the bulkhead out to a bigger one? Thanks for all your help.

