probably too late but my tankwas badly rusted and I cleaned it out with a 50/50 mix of water and muriatic acid. Then I soldered on 14 patches on the outside of the tank over the holes then got a seal kit from my local jobber and lined the inside of the tank by rolling the tank around. It worked. The tank has been in use now for 1/12 years with no leaks. (I did test it before installing it.