I was wondering how much pressure should be in a bladder tank? :rolleyes:

Well, that depends on the size of the tank and the manufacturers specifications.

You set the pressure at 2 pounds under the cut out point for the pump. So, for instance, if you are set to 30/50, then the pressure at the top of the tank should be 28#.

As above, with the tank empty, add air until 2 PSI under the kick in pressure.