What causes the water in the pressure tank to rise above the float, even collapsing the float periodically. Needing to be totally drained every 2 months to reestablish proper pressure. Has been this way since newly drilled. Currently running constantly but never above 30 psi . Well is 6 years old. I realize the pump is probably stopped up with rust or motor is too weak to maintain pressure,but if I pull and replace I would like to know how to fix the other problems

What causes the water in the pressure tank to rise above the float

What float are you speaking off? Pressure tanks work off pressure.

I think I know but tell me anyway.

Float has a pressure gauge on top and a bleeder valve underneath. It screws into the front about midway up the tank

What you have is a pressure tank with an AAC (Automatic Air Control) valve.

Do you know and understand what the AAC valve does?