Having to deal with rust a lot. Both as a mechanic and living in an area where rust is a big problem. My only concern with fixing it is will it just leak again now or in the near future. And if it was thin in one spot it probably is thin in another. I'm just saying rust doesn't pin point one spot unless there is a reason for it to. Plus I love blueberries. And you could always place a plank walkway down the center. Now I wish I had a stock tank. I really like the whole aquaponics concept too......Phil