Greg's 75g

[Reef Pilot]

Originally Posted by gregzz4

Yes, but I never used it in the first place. I get 0 TDS with just the RO
When you look at the first pic, you'll see 2 grey valves with green handles. I plumbed it with Tees so I could use or bypass the DI. I was placing a BRS order so threw it in 'cause it's fairly cheap. I figured I might need it one day if our water went for a poop

Wanna buy it ?

I have a full RO/DI system with a dual TDS meter. What I find with mine is that sometimes my RO water will get up to about 8 or more TDS, but after DI is still always 0 or 1. That tends to happen in between water changes, when only my ATO is in use, and RO only in the kitchen. My RODI also has an auto shut-off valve, though not sure if that has anything to do with it.

When I do a water change, I also do a membrane flush, and then it comes back down to usually 0 or 1. So, my RO water TDS does vary somewhat, but my DI water is constant.

I'm in Langley, and our water here does not seem to be as low TDS as others in the Lower Mainland report. It is usually around 50 or 60 TDS out of the tap, and I find sometimes my pre-filters will clog up in only about 3 months (sometimes they are OK for 6 months or more).

I also have 2 pressure tanks (after RO, but before DI) with my system, so always have about 6 gal or so of immediate water available, which is very handy in the kitchen where we use the RO only outlet for drinking water, coffee maker, etc.