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Thread: SWG for ~20,000 pool, also max temp?

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    SWG for ~20,000 pool, also max temp?

    I am thinking of converting my new pool to salt water.

    I've been looking at the Hayward AR9 system, which is listed at 25,000 gallons. How is this measured? With the pump running a certain number of hours per day? Ideally I would only be running the pump while the solar system would be effective. The AR15 system which is quoted for 40,000 gallons is only like 100 bucks more

    Also is there a temperature when SWG's become ineffective? Sometimes I'd like to be able to heat the pool to a comfortable night temperature, meaning 90 or higher degrees.

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    Re: SWG for ~20,000 pool, also max temp?

    Firstly how big is your pool, we recommend here that minimum is twice the size of your pool, that allows you to run swg and pump on a timer. AR9 only puts out .9 lb cl2 a day...ar15 puts out 1.4 lb a day

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    Re: SWG for ~20,000 pool, also max temp?

    Pool is about 20,000 gallons, I was half way through saying that in the title haha.

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    Re: SWG for ~20,000 pool, also max temp?

    Then you want the T15 cell.

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    Re: SWG for ~20,000 pool, also max temp?

    The high temperature will not be the problem, SWG's will not produce chlorine when the water temperature drops too low, around 50 degrees or so.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    mas985's Avatar
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    Re: SWG for ~20,000 pool, also max temp?

    Given we are in the same area and have the same pool size, with a T-15 cell I can get my run time down to about 4 hours at 90-95% SWG setting and consistently maintain a 4 ppm FC level (80 ppm CYA) during the summer (peak load).

    As for heat, higher water temps tend to increase the FC consumption so you might need to set the SWG a little higher.
    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: SWG for ~20,000 pool, also max temp?

    That 20,00 gallon pool rating is based on it running 24/7 set at 100%. That's why its for pools "up to 20,000 gallon".

    Always buy the larger cell, it's only about $50 more and will last much longer. It can be set all the way down to 5% if needed or set to run only a couple hours a day.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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