Well water CO2 removal for RODI

[Mike konesky]

Will aeration lower dissolved co2 in my RO water? Currently experiencing very fast depletion of my DI resin. Can I fill a brute with just RO, aerate, then pump the aerated water through the DI resin. Curious if a pump with a venturi will be enough. If this will work how long should I aerate the water before pumping through the DI resin. Source water is 480ppm. RO water is coming out at 26ppm, could this be the issue and not co2? Thanks for the help.

 

[LIreefguy]

My ro comes out much lower than that.
Although I am no rodi expert but I normally drain mine till it reaches 10 the I shut off flush

 

[MLSReefer]

You will want to store the RO water into a reservoir and put an air stone and pump in it and let it pump for a while until under 10 ppm of CO2.

when my float valve hits and the reservoir is full, i have a ball valve before the float so I can shut water to the unit. I'll completely aerate the CO2 out of the water and use a test kit to verify. once it's done, I turn on my aquatec pump through the DI stages into another reservoir

use the co2 test kit from spectrapure and google DIY CO2 degassing tower. @TheEngineer has a good write up based on Spectrapure design

 

[MLSReefer]

meant to say "i have a ball valve before the float so I can shut off water to the reservoir*

 

[BoomCorals]

I don't even aerate mine, but I leave my RO water sit in a 50g barrel overnight before using a booster pump to pump it through a double canister DI. Works really well.

You can test how much CO2 is in the water by testing the PH of the water right after it comes out of the RO unit and then again after it sits 12 hours. If ph has stabilized all the CO2 has off gassed and it's ok to pump through the DI.

 

[MLSReefer]

I don't even aerate mine, but I leave my RO water sit in a 50g barrel overnight before using a booster pump to pump it through a double canister DI. Works really well.

You can test how much CO2 is in the water by testing the PH of the water right after it comes out of the RO unit and then again after it sits 12 hours. If ph has stabilized all the CO2 has off gassed and it's ok to pump through the DI.

Letting it sit and aerate works, but IMO if you cant verify the CO2 ppm then you are in the unknown. But you can let it sit overnight and it will degas to a certain extent but might take longer. Havent tried that

 

[Marcos_]

You will want to store the RO water into a reservoir and put an air stone and pump in it and let it pump for a while until under 10 ppm of CO2.

when my float valve hits and the reservoir is full, i have a ball valve before the float so I can shut water to the unit. I'll completely aerate the CO2 out of the water and use a test kit to verify. once it's done, I turn on my aquatec pump through the DI stages into another reservoir

use the co2 test kit from spectrapure and google DIY CO2 degassing tower. @TheEngineer has a good write up based on Spectrapure design

So from what I understand, after you aerate the co2 out of the water in a reservoir, you can use a aquatec booster pump directly from the reservoir thru the DI Stage? Do I just place the RO tubing in the reservoir, connect it to the inlet of the aquatec booster pump, then the outlet from the booster pump to the DI stage? Thanks in advance

 

[wake122]

So from what I understand, after you aerate the co2 out of the water in a reservoir, you can use a aquatec booster pump directly from the reservoir thru the DI Stage? Do I just place the RO tubing in the reservoir, connect it to the inlet of the aquatec booster pump, then the outlet from the booster pump to the DI stage? Thanks in advance

Did you ever figure out an answer to this? I'm having the same issue currently.

 

[redfishbluefish]

There are a couple methods for aerating...and if handy, you can make an "in-line" de-gasser. I would not use an Aquatec...high pressure pump that you don't want to use for DI. Here is the BRS video on the subject: