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Thread: RO water smells like fish

  1. #1

    Default RO water smells like fish

    My RO water has a fishy smell. I had low water pressure so I changed all the charcoal and sediment filters. Still had low pressure and found that the bladder in the tank had ruptured so put in a new tank. pressure came back but still smells fishy. I put in a new membrane and polishing filter and still smells bad.

  2. #2
    DIY Member rjh2o's Avatar
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    Default Fishy smell

    Bacteria can cause many different types of odors. The system needs to be sterilized. Unfortunately I would suggest replacing all the filters, including membrane, so there is no change of re-contamination. www.softenerparts.com sells the sanitizing solution for this. You can use house hold bleach also.
    1. Turn incoming water off
    2. Open RO faucet and run all the water out of tank
    3. Remove all the filters and membrane
    4. Empty RO tank completely
    5. Add 1/2 teaspoon to each filter housing, reinstall housings with NO filters
    6. Turn the water back on until water comes out of RO faucet
    7. Shut the RO faucet off
    8. Let this sit for 10 minutes
    9. Flush the system completely of any residual bleach
    10. It helps to use latex gloves when installing filters to prevent contamination again
    11. Re-install all filters
    12. Flush 2 tanks of water at RO faucet
    This is recommended each time you change filters. It is very easy to re-contaminate the system with just bacteria from your hands, so use the latex gloves and wash hands thoroughly before changing any filters.
    RJ

  3. #3

    Default

    Thank you. Do I have to throw out the new RO membrane too?

  4. #4
    DIY Member rjh2o's Avatar
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    Default

    Sorry to say so but yes I would for fear of re-contaminating the system. If the RO is more than 3 years old you may want to replace the capillary tube also.
    RJ

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