OK, here we go. I currently run a 29 gallon display tank with an overflow hob to a 10 gallon refugium with chaeto and rubble. Return pump is a Rio 1200 that I honestly have to back off using a valve. . I soooo want to add an additional plastic tub of around 30 gallons with live rock and a skimmer. But for the life of me, I can't decide how to plumb this freaking thing. The refugium is below the display tank and I planned on the plastic tub/sump being next to the refugium. How the heck do I achieve this with the least amount of chance of flooding, power outages concern. Help!