Went and looked at a 135g tank. Had tank, stand, 2 ac
500's, and lights for $225. The tank looked great until I looked at a lower corner and noticed a small crack in the back pane of glass. The crack was right at the joint with the side pane and about 3 in up from the bottom. Is this repairable or would it need a new pane. The glass is either 1/2'' or 5/8'' thick.