In ,
Godspeed typed:
Anyone know how to fix a leaking 5000 gallon steel water tank on a
concrete pad?

One of two tanks is leaking from the bottom. Not much, but enough to
keep the concrete always wet (which likely is rusting it out even
more).

I can't figure out how one would go about fixing this kind of leak.

If it's that small a leak, and the surrounding material is in good shape,
they make screw-in patches for those. It's like a short lag screw with a
rubber washer that you just screw into the hole. Decide the size you need,
then get two: one you think you need and the next larger size too, just in
case. Works well and will stand up to the pressure. Sounds like it's just a
pinhole right now so timing's good.