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Thread: What is reverse osmosis?

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    Join Date
    Apr 2017
    Hillsborough New Jersey

    What is reverse osmosis?

    And how's it done?
    Vinyl 18' X 37' IGP 3'/8' deep
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    Swampwoman's Avatar
    Join Date
    Apr 2012
    Grand Rapids, MI

    Re: What is reverse osmosis?

    For pool purposes, in layman's terms, RO is a type of very fine filtering performed via a mobile unit that essentially filters your water onsite through a special series of membranes designed to remove things such as cya and ch from the water. A lot of water is "wasted" in the process, but it still conserves more water than dumping and refilling a pool that has high concentration of cya or ch. it is an ideal solution in drought areas with water restrictions. The water cannot have algae, etc., or the filtering will not be productive.

    I've never used this service, but essentially, the supplier bring the equipment onsite, runs the process, then removes the trailer/truck to the next job.

    For household drinking water and salt water aquariums, the R/O systems are much smaller and permanently installed, but likewise remove impurities from the water, and lower the TDS (total dissolved solids). In the realm of aquariums, this is important, especially if you're on well with iron In fact, too much iron will foul the membranes quickly and best practice for household use is to plumb the RO after the water softener.
    In ground vinyl Grecian, 24k gal, Hayward 220t sand filter, VGreen VSP 165, Hayward SWG, Raypak NG 265k heater, dolphin m4.
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    dsmith99's Avatar
    Join Date
    Jun 2016
    SW, Iowa

    Re: What is reverse osmosis?

    Reverse Osmosis

    The equipment is specialized and pretty expensive for a large scale treatment like a pool so the service is not an option for most of the country. Usually only available where there is big demand due to higher temps, year round pool use or exceptionally hard water. For most of the country drain and refill is the only option.
    AGP 24' x 54" approx 14000 gal Full sun all day, Hayward 1.5 HP and EC50 D.E. filter
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    Dolphin E10 robotic cleaner, 330 gallon Tiger River Spa, Taylor K-2006C test kit

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    Join Date
    Jun 2016
    Martinez, CA

    Re: What is reverse osmosis?

    Last year with the drought in norcal they wanted $600 to filter a pool up to $20k. Cost of water for a drain and refill was $150 so really wasnt cost effective. Sanitary district will require you to apply for a permit in some areas and restrict gpm flows into the drains so as to not inhibit ater treatment. No cost for the permit in my town but others may be different.

    Ive also seen where people place a tarp vertically in the pool and drain from one side so as to not waste as much water when doing partial drains to get down CYA levels.
    18,000 gunite pool/spa combo. Pebble tec, iaqualink rs8, cl580 filter, aquapure 1400, 400k btu lx heater, 10 solar panels, jandy 1hp, 1 1/2hp, and 2hp stealth pumps for circ, spa, waterfall

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