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Thread: Does evaporation/auto fill lower salt levels?

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    Does evaporation/auto fill lower salt levels?

    I have them same issue with salt dropping. I have a 17k gal pebble tech bottom pool in southern California. I do have an auto filler and it trickles most of the day. However, our pool also has an attached jacuzzi which we use quite a bit. So with kids jumping in and out and steam from the jacuzzi the auto fill dribbles throughout the day.

    Does evaporation/auto fill lower salt levels?

    Thank you in advance,

    Steve
    Please put the following information in your signature.

    1) The size of your pool in gallons 26000 g
    2) The type filter i have is cartridge
    3) IG (in ground)
    4) it's IG,plaster
    5) pump is .50 1.98sf .99thp and the (flow rate) of the filter is 120 gpm.

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    JasonLion's Avatar
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    May 2007
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    Re: Does evaporation/auto fill lower salt levels?

    Evaporation and refilling does not lower salt levels. Both splash out and leaks followed by refilling does lower the salt level.

    If you salt level is going down noticeably, you either have an huge amount of splash out, or you have a leak.
    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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    Re: Does evaporation/auto fill lower salt levels?

    Is there an average of how often/how much salt is typically used in a 17k pool? I do not have huge splash out.

    Thanks in advance.
    Please put the following information in your signature.

    1) The size of your pool in gallons 26000 g
    2) The type filter i have is cartridge
    3) IG (in ground)
    4) it's IG,plaster
    5) pump is .50 1.98sf .99thp and the (flow rate) of the filter is 120 gpm.

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    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,472

    Re: Does evaporation/auto fill lower salt levels?

    I only add salt once a year when I replace some of the water. If you don't have splash out, then the only other cause would be either a leak or the salt cell could be failing if you use that as a salt measurement.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: Does evaporation/auto fill lower salt levels?

    At least this spring/summer in Houston, rain is my biggest reason for loss of salt. Rain is filling the pool and water is flowing out the overflow.

    Robert
    22K inground, PS8 Aqualogic SWCG, 3/4 hp 2-speed Hayward Tristar pool pump, 2hp Pentair Whisperflo waterfall pump, Pentair 320 Clean and Clear cartridge filter, Sta-Rite heater, Intellibrite lights

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    Join Date
    Apr 2007
    Location
    Ft Lauderdale, Florida
    Posts
    1,455

    Re: Does evaporation/auto fill lower salt levels?

    The fact that your auto water leveler is running constantly means you're losing water somewhere. If you turn OFF your automatic water leveler, a dropage of your water line will indicate how much water you're losing.
    If you have a chance to do this with no one using the pool or spa, would confirm a leak.
    Sean Assam - Sean@teamhorner.com
    National Accounts and Commercial Products Manager
    AquaCal Heat Pumps www.aquacal.com
    AutoPilot Salt Chlorine Generators www.autopilot.com

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