Well, you got me thinking. Thanks for the quick response, awesome info, great pictures/diagram and as always, love your tank.
Definitely will consider the closed loop idea. The only thing holding me back is I already have some water and live rock in there to start the cycle going. It will be a lot of trouble to empty it out and take it to be drilled and it is glass so I'm too skeered to drill it myself.
Really tempting though. I may just have to tear it apart this weekend and get it done. Are those all 1 inch pipes? What pump are you using for the closed loop? How many gph total?? Thanks again, Amy