I have a well 35 to 40 foot deep. Above ground pump. Good pressure at pump but only about 5gal. Will go into blatter tank

Not real sure how you can have good pressure at the pump and no pressure in the tank. What makes you think you have good pressure at the pump?

The pressure tank is not your problem, though SB is correct is telling you how to set tank pressure correctly. The only source of pressure you have is your pump. Tanks simply store water under pressure.

What's the cut in point on the control box? What pressure do you have the bladder tank set at? Let me know, tom