Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
i run 2 di resins and get about 6 months out of them. I run between 100 and 90 psi and make about 50 gallons a week. My in coming water is only 150 tds.
When I had a hang on the back overflow. I mounted a float switch on the rim of the tank that would shut my return pump off if the water level got to close to the top of the tank.