RO/DI Unit test levels
- Thread starter DJE
- Start date
Lil BamBam
Premium member
Thats a very low PSI.. You might need a pump to get better PSI. Just not sure about the phosphates.. Could be the container being used
More will chime in and help
More will chime in and help
DJE
Active member
Im getting the rodi water straight from the tubing so it's not even making it to the bucket. I just might go ahead and order the pump from BRS since the psi is really low.
I tested with the Hanna Checker and it has ±0.04 ppm ±4% of reading accuracy. So now I'm not sure if I have .04 or .12.
I read somewhere that if my tds is 0 then there shouldn't be any phosphates however if the hanna checker has ±0.04 ppm ±4% accuracy then is my hanna checker the problem. My reagent is fairly new, just got about a month ago from BRS and it's not expired.
Captmrbles
New member
what is the TDS of the tap water you are using and the TDS after it is filtered? Here is a link to some info on how RO/DI works. Perhaps one of your filters is not working properly. I would check to see if something is not seeded properly, aka take everything apart and put it back together ensuring that are no places for water to sneak by without being filtered. Have you measured all the other post filter levels or just po?
Captmrbles
New member
DJE
Active member
My TDS of tap water is 156 and after the DI it's 0. I will check out the link and see if Im missing something. Thanks
Captmrbles
New member
If your tds is 0 then one of your tests is off. Either you TDS meeter or your probe. Have you tried getting a po reading with a test kit? Are you currently experiencing unwanted algae growth?
DJE
Active member
So I flipped the tds meter to the tap water side and it comes out to the same reading of 156 and then put it back on the out of the DI and it reads 0. Im going to order a different test kit and take it from there.
I am not experiencing any algae outbreaks(knock on wood). I probably clean the glass once a week and its very minimal. Ill see what results I get from a different test kit.
DJE
Active member
Got it.. What test kit for phosphates would you recommend Ted?
SkullV
New member
The only one that you can get a REALLY good reading from is the low range Hannah Checker. The rest of them its almost impossible to differentiate from 0 and the rest of the low range. If not hannah and you want to chance one of them I would go with Salifert, LaMotte, or Red Sea Pro.
RedDevil.258
Active member
Good thread!