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JOEL
02-24-2008, 11:01 PM
I have an ro unit and was wondering when you now it's time to replace
your membrane do you go by the tbs reading I'm sitting at 003 is it still good or should i replace it?Also how often should I replce the other filters?

thx

Joel

Skimmerking
02-24-2008, 11:06 PM
i have a meter sitting on my up out from the RO menbrane and then a meter coming out from the DI so I know when the membrane is gone and the DI is going. I usually go until its at 5 for a reading but just remember that if you have a DI container at the end of your RO system to polish the water. the longer you wait to change the membrane the faster your DI will get exhausted

mark
02-25-2008, 12:05 AM
Got the below fr Aqua-safe in response to an e-mail I sent them.


When to change the filters:
PRE FILTERS: We recommend changing the Pre filters every 6 or 12 months depending on use. If your average use is approx 2-3 gallons a day then you would change them every 12 months, if your average use is approx 5-6 gallons a day then you would change them every 6 months. or Adjust accordingly for a higher average use ie. for 300 gallons a month you would need to change the filters every 3 months.

POST FILTER: The Post Carbon Final filter for taste and odor only needs to be changed ever other time from the Pre filters.

DI FILTER (Maximus and Aquarium model only): If you have a DI filter (Refillable Clear Canister with DI Resin beads) you change it when the DI completely exhausts (changes color), how long it lasts varies from system to system depending on your use and TDS. If you have the older style white disposable DI filter you change it when the water starts tasting funny or the TDS goes up.
The 6oz DI canister lasts the average family approx 3-4 months.

RO MEMBRANE: The membrane generally lasts 2-5 years. We recommend manually flushing the membrane once a month along with changing the filters every 6-12 months to prolong the life of the membrane.