I just returned from Home Depot with most (hopefully all) of my plumbing supplies for my 90 gal tank. I've got two 2" bulkheads so I'm going to run 2" PVC from the calfo down to the 30 gal long sump (after I baffle it that is). My return will be 3/4" PVC. Before I actually cut any thing and start gluing, I wanted to run my plan by y'all.

I plan on running 2" pipe straight down the back of the tank to 90 elbows, under the tank a bit then down into a single 2" pipe (so far, 3 90s per pipe). One pipe will feed into the end of the pipe, while the other will T into it. There will be another T between the two drains/feed pipes to feed the skimmer area of the sump while the end of the pipe 90s down through a ball valve (for restricting the flow) into the fuge area. I'm no artist, but I'm working on a drawing.

Any thoughts, suggestions, warnings, etc.? Thanks.