I have a 308ft well that was dug within the past 6 months and our pressure tank is sweating pretty bad. I understand that the cold water is bringing the temp. of the bottom area of the tank below the dew point temperature. It is a wellmate fiberglass tank that is roughly 4 ft tall. I also just installed and am bypassing a softener and assume that once in use, it will have the same issues. The pressure tank sits on a base so i cannot wrap the entire area with insulation. I would like to solve this so a mold issue does not start. Is there a jacket you can zip around the tank? Or something you could apply to the surface of the tank? thanks