I have a 40B back drilled for overflow on the left and return on the right. I have a 20L sump. I have an old 10G I want to use. The fuge will have to go on the side of the stand. I am looking for ideas on how to plumb this in. Should I T off the drain or return? and add a ball valve. Will this be enough flow to supply the fuge? What about return back to the sump? Will a small ph be enough? Maybe a MJ 900 or 1200. Any ideas? Thanks in advance.