Puratek RO/DI Cartridge Question

BlueTang<3 · #1 07-19-2011, 01:37 PM

If it is starting to rise then the di resin is becoming exhausted. The ro membrane should be good for a few years. I like to use the colour changing di resin so i know when it goes from blue to brown it is starting to become exhausted.

Madreefer · #2 07-20-2011, 12:33 AM

Quote:

Originally Posted by BlueTang<3

If it is starting to rise then the di resin is becoming exhausted. The ro membrane should be good for a few years. I like to use the colour changing di resin so i know when it goes from blue to brown it is starting to become exhausted.

Really? I just changed all of them in the begining of Jan. My DI resin in the cartridge is kind of brown in color and only 1/4 of it has changed color to a darker brown. Thats chitty if i'm only gettting 7 months out of it at 50-60G a week.

phi delt reefer · #3 07-20-2011, 12:57 AM

Quote:

Originally Posted by Madreefer

Really? I just changed all of them in the begining of Jan. My DI resin in the cartridge is kind of brown in color and only 1/4 of it has changed color to a darker brown. Thats chitty if i'm only gettting 7 months out of it at 50-60G a week.

1400 gallons isnt bad - if you arent flushing before you restart your ro then you are pushing 100+ TDS through the DI resin and exhausting it quicker. everytime you restart your RO have the water from the ro membrame (before the resin) empty into a bucket for 5 minutes. this will flush the membrane. just for chits and giggles check the tds of that water