Under all that dried salt/scale/coralline algae I uncovered a scratch free flawless tank. The overflow even has the bottom suction plate to help move materials up to the main spill over from the bottom water levels. I painted the back black last night and tonight I will leak test it. I realized that the metal stand didn't touch the bottom of the tank in one area so I'm going to cut a sheet of plywood to go in between. I think I will shim in between the stand and plywood top so the weight transfers to the stand properly. I'll probably build a nice stand for this thing and give the double 75 stand away at some point but I'll use it for now.