Ok so I'm a newbie here; gather all my info to start my new tank which I purchased on offer up, Yes a used 65 gallon tank. When I picked it up it was night and I honestly didn't see this crack, I think it may have happened on the way home in the bed of the pick up maybe the hand truck bumped it I don't know! I'm just starting, on a serious budget and now possibly out what I paid is really painful and stressful. After much Google search I think it can be repaired with a glass patch. Here are pictures of the crack taken from the back, side and front. The crack is on the back, so the repairs wouldn't be seen since it would be facing the wall and have rock in front.
I'm thinking a 1/4" glass (same as tank) 6" wide by 27" long on the inside (water pressure World be from the inside out)..... Ge sc5000 silicone from what i googled...... Thoughts please
This picture is the back, not Sure why but the photo uploaded upside down