210 gal reef
lights - 3 -250watt 20k MH's with 2-96 watt 50/50's
sump is self made with a filter sock, bio balls in the middle (don't fret, they are coming out in a week.).
the sump pump is external pulling the water from the sump and returning to pad and bio ball chamber with a valve top bypass if wanted.
I have 2 closed loops for circulation.
Skimmer brand is unknown to me as it was given to me with no brand name on it. I'll get a pic later.
crushed coral bottom (nip it you sand fans).
The 72 does not have all the LR in it, I have a large tub with more, should be good for a 210.
The filter plumbing is all gravity to the sump.