Have a 15 year old deep well system (~500ft). Latley the water pressure has been very sporadic. This morning I checked the bladder tank and it had 0 pressure when empty. I filled the tank to 30psi and restarted the well. The pump kicks off at 55psi but pressure goes to 0 before the pumps kicks on again. Since I drained the tank I am getting A TON of sediment in my whole house filter. Do I have a bad tank or is it the pressure switch. What's the best way to troubleshoot this?