I have 2 tanks to trade for frags or whatever. First is a 30 gallon All-Glass commercial. It was used with fresh water and that has clouded the glass(it was used in a fish farm). But was recaulked and I have used it for the last 8-10 years or so with salt water. It is drilled 1 1/4" hole about 4 inches from one end centerline. regular 30 size 30x 18 tall 12 wide. Heavy duty black trim- no center brace. Would make great sump or hosp tank. Next 10 gallon all glass, drilled, same size hole and placement, now has a plexi divider siliconed in. Could easily be sliced out w/razor. Clear clean glass. Let me know who wants them. I gave a bunch of tanks and overflows, drums and stuff away last year and was supposed to get some zoas and frags in return, but havent seen any yet...hint, hint, hint. PM me if interested or respond back here, Steve. OH both tanks have a piece of plexi siliconed in place on bottom hole, closing off drilled hole so it could be used as a stand alone. Also could easily be scraped out.