I just got a 300 gallon 6'x3'x27" perfecto reef ready tank. It comes with two returns and two drains. I am thinking about making the two bigger drains go into a 75 gallon tank with all bio balls and then the two returns drain into a 20 or 29g into two prefilter socks. So 4 total drains Then have the 75 and 20 or 29 plumbed together. Then have an external pump go into 3 3/4" return pvc from over the back every foot. Any input on this? Good idea. Plumbing tips? Glass good or bad to have drilled? Ideas on custom drip tray for the entire 75? Thanks in advance

That is crazy !!! I won't be trying to drill any glass tanks now, that for sure.