[suckafishtankcleaning]

i dont think that the it matters how much the protein skimmer goes as long as its not draining the sump. if your overflow box and a return pump can keep the sump full. i think you may just have to add more water once the protein skimmer is full and running. i could be wrong. i know you dont want to much flow throught the refu. watch the placement of the out flow of your skimmer