Rodi

texcaltipotla · Jan 29, 2017

Fellow reefers
I have a question regarding a BRS RODI unit, I just replaced the DI resin in my unit and my TDS meter is showing a reading of 003 ppm will this reading go back to 0, it was at 0 before, should I use the water , I only use it to replenish for evaporation water.
Thanks

dorkymk3 · Jan 29, 2017

Before using your water. Let the RODI make at least 25g and dump it! After that you should be good to go.

ndrwater · Jan 29, 2017

^^^^^what he said^^^^^^^^^^^^^^^
But... Here in Anaheim , TDS can be rediculous. I have used RODI with 3ppm with no ill affects. Wouldn't suggest doing that long term, but in a pinch it'd work

texcaltipotla · Jan 29, 2017

Thanks for the help !!

texcaltipotla · Jan 29, 2017

Alright I'm on the 20th gal and the reading is going up instead down , right now is showing a reading of 004 ppm, I'm going to need water ASAP to makeup for evaporation can I use it as is?
Thanks

OGFrenchHorn · Jan 29, 2017

texcaltipotla said:

Yes, you can use it.Back in the day people used water straight from the hose and just added stuff like Prime to dechlorinate the water and they kept reef tanks. I change my DI when it hits 10ppm. Before I got an RODI unit I used just RO water with can be at 20ppm with no problems.

OGFrenchHorn · Jan 29, 2017

Oh! how old is the unit? maybe the TDS meter is faulty.

lowbudget · Jan 30, 2017

is this after the di? or after ro membrane. if its after di your ro membrane possibly depleted

texcaltipotla said:

solitude127 · Jan 30, 2017

Did you pack the DI resin yourself?

texcaltipotla · Jan 30, 2017

Unit is about 6 months old meter showed 0 from day 1 until I changed the DI resin Saturday night , and yes I packed the resin myself on to the cartridge as the instruction on the videos from BRS. I was told to let it run for about 25 gallons , and then check but still there is reading of 002 , and that the TDS may be calibrated

Frop1 · Feb 8, 2017

What about what you're measuring in, is that clean?

bvysochin · Feb 9, 2017

How are you measuring the TDS? With an inline meter, or with a tds meter that you dunk in the container? How many DI cartridges ? How old is the Di resin ? It has a shelf life and can be expired. If you have two di cartridges, did you change DI in both or just one ? Is the water channeling it's way through the Di resin ? 2 tds is still really low.. and I wouldnt worry about using it as top off water until you can figure out how to get it down to 0.

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