Unlike the farm supply I am not going to build a massive concrete containment vessel to park this thing in and I will not fill more than a semi load of 28% (6' deep?) For a short time.
Inspecting the bottom of the tank I found a stain around an intrusion in a weld seam. I do not have a man hole to get inside. I have an old Hobart square wave tig and I might be able to reach the spot from underneath but have not welded overhead tig on Aluminum. Try it? Tear the top off and inspect inside and spool gun what I find would be the right way but also easy to get killed without the lifting capacity.
1/4 aluminum overhead Tig or get more into it and call for a spool gun or spend for new aluminum welding capacity?