rodi weirdness

[Cal_stir]

Originally Posted by imisky

It all depends on where you live, here in Langley, 1 city away from abbostford, my TDS is at 5-13 depending on how much rain we get, TDS checked with 4+ tds meters. BC water is surprisingly good, thats why some get away with tap water for softies and LPS.

as for the RODI unit, did you backflush it? is there a restricting valve for the waste water on the unit that's fully closed?

WOW!, I'm from ontario, we consider that PURE water here, i would be ashamed to flush the toilet.
my TDS is 8 after a 1 micron particle filter, a 5 micron carbon block, a catalytic GAC canister, a 1 micron carbon block and a spectapure RO membrane.

[scherzo]

As Eugene said, backflushing may help.. and maybe let it run for a couple of hours.

I just checked my TDS out of the tap and I'm at 6 right now. Yes we have pretty good water here out west. It also rains a lot so we get a lot of water.

Your RO membrane should last for a few years out here. I change my DI after about a year or so.

Can you check your ppm after the RO and before the DI?

[imisky]

Originally Posted by Cal_stir

WOW!, I'm from ontario, we consider that PURE water here, i would be ashamed to flush the toilet.
my TDS is 8 after a 1 micron particle filter, a 5 micron carbon block, a catalytic GAC canister, a 1 micron carbon block and a spectapure RO membrane.

TDS after my 3 pre filters drops down to about 2-3. Ive been in the hobby for about 8 years now and Ive only changed my RO membrane 1x and DI resin 1x.

like everyone else suggested you might need to flush the system (by pass the RO membrane) if the carbon in your pre-filters are new it'll cause your TDS to go up, and check for any blockage in the waste line, I had tried to get 0.5:1 waste to RODI ratio out of my unit before by restricting the waste water and instead of doing what I wanted it to do it did the opposite (should have been bluntly obvious that it wouldn't work but I thought I'd try anyways)

[Cal_stir]

I've been in the hobby @ 2 years and have changed all my filters and resin at least 5x and my membrane 1x, I run a 9 stage RODI and change the filters and resin when TDS reads 1ppm

[doch]

WOW! If my tap water was 6ppm, I wouldn't even bother with RO/DI. I've been running my tank now for 2 years and just recently set up an RO/DI, and my tap water is at 170ppm.

[fiorano]

I let it run for a few gallons and I tested 0 to 1 ppm so I thonk it just needed that! Thanks for all yhe help guys. However since I downgraded from my 125 to a biocube I am probably just going to run one of those small tap water pruifiers. So if anyone wants to by a rodi unit let me know! And thanks for the assistance.

[Buckeye Field Supply]

If your RO system didn't run for a year - do not drink that water. Suggest you remove all the filters, including the membrane, sanitize the entire system, and install new filters.

Chances are your membrane has dried anyway - but you have to sanitize that system before you do anything.

Russ