DI Resin Changing Color after 5 Gallons With New Home Filtration In Place

[See Gee Sea]

Hello Gurus - I recently had a charcoal flitration system put into my house due to an "all natural fertilizer" farm down my street contaminated everybody's well with PFAS (a forever chemical that causes cancer). Prior to this, I was using a 4 stage BRS RO system and the DI resin never changed color. Since I now have very low TDS coming from the tap and a massavie amount of mechanical and carbon filtration coming from the tap I was just using the DI resin stage plus the RO membranes. The DI canister is literally changing color just after filling 5 gallons. Am I pushing too much pressure through it possibly? Should reinsert the charcoal and poly fliters to the RODI system? Thanks in advance! I was reading some of the other posts related to DI burning out fast due to elevated PH from home systems but out of my tap is only 7.8 vs 7.0 before I had the filter put in.

 

[KrisReef]

You need at least mechanical filters before the DI resins.

 

[Uncle99]

Hello Gurus - I recently had a charcoal flitration system put into my house due to an "all natural fertilizer" farm down my street contaminated everybody's well with PFAS (a forever chemical that causes cancer). Prior to this, I was using a 4 stage BRS RO system and the DI resin never changed color. Since I now have very low TDS coming from the tap and a massavie amount of mechanical and carbon filtration coming from the tap I was just using the DI resin stage plus the RO membranes. The DI canister is literally changing color just after filling 5 gallons. Am I pushing too much pressure through it possibly? Should reinsert the charcoal and poly fliters to the RODI system? Thanks in advance! I was reading some of the other posts related to DI burning out fast due to elevated PH from home systems but out of my tap is only 7.8 vs 7.0 before I had the filter put in.

When incoming TDS is north of 5ppm, your DI will expend quickly. There’s something there it’s pulling!

 

[Jo P White]

I had issues like that too since I’m on well water. I added 2 stages before my DI of the individual resins (depending on which changes the most you’ll know what your water issue is and not have to change the others as often) and that helped a lot. I also added a canister before all those to remove pharmaceuticals, etc. I have 6 different canisters running and after like 3 years of no changes I’m getting 2ppm out of the whole system.

I have the charcoal, RO, pharm, resin 1, resin 2, and then the mixed DI.

 

[See Gee Sea]

Thanks all! I run the spectra DI for silicates after the conventional resin. My ICP had my silicone north of 500 ppm!

 

[PHXHobbies]

CO2 will surely eat up DI filters, Check your pH and alkalinity of the RO water then use the "CO2 ph+alk chart" on google to see if you may have CO2. Or just buy a spectrapure CO2 test kit which is the best way to verify