Quote Originally Posted by grouch View Post
Mine ran about 3 after DI with new filters all around also. It was only like the first time after filter change. Tap water runs about 320 at faucet (liquid rocks). I bought a second DI canister from A.W.I. with 5 lbs. of refillable DI now I am running 0 after both DI all the time.
Shouldnt tds be 0 after the 1st di resin?

Adding a second is covering up another problem...