- Messages
- 247
- Location
- Rhode Island
i have a small r/o unit (35gpd). i also use an add on di unit with it. my tap water isn't very hard 4dgh/4-5dkh but the ph is over 10. after going through the r/o and di, the water is as follows: 0dgh, 0dkh, and ph 5.0. the thing is that if i don't use the di unit the ph remains above 10 but the kh and gh are still nondetectable with my liquid tests, why is this? i am assuming that it won't take much to lower the ph with 0dkh. i like using the d/i unit but replacing the resin gets pretty expensiv, probably close to $0.15 per gallon. would using peat to lower the ph be as good as using the di unit?