Ok. All the other tanks I've had have been without sumps. I recently purchases a 60 gallon with a sump tank...20 gallons I believe. It a three compartment, first protein skimmer, next bioballs (soon to be LR
rubble when I get it up and running), and then a third compartment. I have two pumps (I imagine the big one is return), don't know where the little pump goes. Don't know where the u-pipe goes, don't know how to work this type of skimmer. Any and all help will be appreciated. I really want to make this work. Thanks in advance!