Ordered Rock Today. Marco Rock--25lbs plus 5 lbs key cut Pukani--10lbs 5 lbs shelf rock 30lbs from reefcleaners Total 75 lbs. I have prob. 40-50 between display fuge and QT coral tank which gives me 125. Might have to order more but we'll see. Ordered 2 new durso overflow standpipes. Decided not to use old icky ones that came with tank. Getting ready to order plumbing. Might see how much we have on hand to do test runs before order. Hubby will be my plumber for sure! But I'd like to look like I know what I'm doing.... Notes on diagram: Sump will go closer to left side (don't want to redo all bits) Drain and return lines in overflow need to be reversed (don't want to redo) 1-- Should I split 1 drain to the sock & to refugium or leave it all to drain to the skimmer section If yes, use a gate valve to control flow to fuge? See purple T into fuge 2-- Enough unions? Do I need them all? Am I forgetting anything? Plan to use true union balls. Do I need to set up a manifold with 3 or just maybe 2 and add more later if needed? Manifold is in the middle of the split return to tank. Does it need to be separate--a separate T from return pump Right now, only planning on using 1 ball valve to do water changes.