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Thread: Corona Discharge vs UV ozonaters vs salt water?

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    Corona Discharge vs UV ozonaters vs salt water?

    Hello there -
    We currently have a vinyl liner chlorine pool with an autocover (a rather big one, 25'x80') that we would like to reduce our chemical use in. Does anyone know of a good comparison between UV vs Corona Discharge? Or UV vs Salt Water?

    Any help is appreciated!!

    Thank you!

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Corona Discharge vs UV ozonaters vs salt water?

    Is that a public pool? If it is, you're going to be bound by the local jurisdiction. You might want to look into those requirements first.

    Hopefully someone will be along to give you some info.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Corona Discharge vs UV ozonaters vs salt water?

    Those three aren't really directly comparable. Corona Discharge and UV are ways of reducing the CC levels as an adjunct to a sanitizing system, while a SWG (salt water generator) is a sanitizing system.

    I am not a fan of corona discharge. UV is very nice in a public pool/high bather load, not worth it in a residential/low bather load pool.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Corona Discharge vs UV ozonaters vs salt water?

    Welcome to TFP!

    Recognize that if the pool is low bather load, such as with most residential pools, then supplemental oxidizers do not reduce chlorine usage because most of the chlorine usage is due to breakdown from sunlight. So in those scenarios, having a higher CYA level and proportionately higher FC level can help and using an opaque solar cover during the day helps. Obviously, the latter is only an option for a pool that is not used frequently.

    Since your pool is very large, it is more likely to be a high bather load pool in which case supplemental oxidation can help. A properly sized ozone system can cut down chlorine usage, but only in high bather-load pools (in low bather-load pools ozone actually increases chlorine demand since it reacts with chlorine to from chloride and chlorate). A saltwater chlorine generator will generate the chlorine on-site inline and if properly sized can eliminate additional sanitizer/oxidizer usage. UV is most helpful for indoor pools not exposed to sunlight since it can help control chloramines.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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