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Thread: New pool owner - SWG giving too high of a FC level?

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    New pool owner - SWG giving too high of a FC level?

    Hi all - we just moved into a house with a 25,000 gallon pool that has a Hayward Aquarite SWG. I purchased a TF100 test kit and have been using it since we moved in last week. The initial FC level was measuring in the 15-16 range, so I assumed that the previous owners had shocked the pool before they left; after 2-3 days the level did not drop so I turned off the SWG. It took 4-5 days for the level to come down to 5 PPM, so I turned the SWG back on; last night the FC measured back at 15. The SWG is set at 70% and my filter (a Hayward DE) runs for 12 hours daily. Other info - CYA was low at 40 so I added 4 lbs to bring it up to 60; pH is at 7.5; TA 200; CH 250.
    My question is this - is it really typical for SWG to increase the FC that quickly? Should I reduce the SWG to 40%, reduce the pump run time, or both?
    13500 Gal AG - Hayward Sand Filter

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    Glock30's Avatar
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    Apr 2012
    Location
    Massachusetts, USA
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    Re: New pool owner - SWG giving too high of a FC level?

    Steve,
    This is one of those "every pool is different" questions but.....
    I had a very similar occurance with my new pool.

    Your SWG may very well be oversized for your size pool, you could check the website and see.
    Oversized or not, cut your % in half and be prepared to be able to monitor the FC level every day for a week.
    See if it is dropping, staying the same, etc. and get it down to 5 again.
    You should be able to start dialing in your SWG run time or % as you monitor this number and then adjust to get it to level off.
    In my case I am currently gaining about .5 FC every two days so when I get to 5, I will drop an hour off of my SWG run time and start checking again.

    The good news is that next year you and I will have everything all set up and will not have to play with it much.

    I have a 26,700 gal pool running at 40% for 8 hours-BUT every SWG/Pump etc are different.
    Hope this helped.
    18' X 36' Inground Pool 26,000 gallons. SuperMax 27mil/27mil Vinyl Liner-Installed Fall 2011
    Pentair Intellipro Programable Pump (Model 011018) // Pentair S8M 500 Cartridge Filter // Circupool RJ45 Salt Chlorinator
    2 Hayward Skimmers // 3 Returns // 2 Savi Melody Pool lights // TF-100 Test Kit.

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    Join Date
    Jan 2011
    Location
    Huntsville, AL
    Posts
    67

    Re: New pool owner - SWG giving too high of a FC level?

    I have the Hayward Aquarite SWG and and 20k gallons. I recently dropped mine to 50% to get from 7.5 to 5ppm and am only running 7 hours during the day. It is 95 degrees this week and i get sunlight on the pool from about 9-5. I just keep checking FC daily.
    16 x 32 inground with Tara Liner, 1 skimmer, 3 returns,
    1HP Hayward Super Pump
    Hayward Sand Filter
    Polaris 280 w booster pump
    Hayward SWG & Aqua Plus
    k-2006 Test Kit

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    Join Date
    May 2011
    Location
    Orange County, CA
    Posts
    696

    Re: New pool owner - SWG giving too high of a FC level?

    Quote Originally Posted by SteveSD
    Hi all - we just moved into a house with a 25,000 gallon pool that has a Hayward Aquarite SWG. I purchased a TF100 test kit and have been using it since we moved in last week. The initial FC level was measuring in the 15-16 range, so I assumed that the previous owners had shocked the pool before they left; after 2-3 days the level did not drop so I turned off the SWG. It took 4-5 days for the level to come down to 5 PPM, so I turned the SWG back on; last night the FC measured back at 15. The SWG is set at 70% and my filter (a Hayward DE) runs for 12 hours daily. Other info - CYA was low at 40 so I added 4 lbs to bring it up to 60; pH is at 7.5; TA 200; CH 250.
    My question is this - is it really typical for SWG to increase the FC that quickly? Should I reduce the SWG to 40%, reduce the pump run time, or both?
    Seems like you might want to just dial down the output of your Aquarite to about 20% output or so. This has the advantage of prolonging the life of the cell as well. You could also cut the pump run time, but the point is that you want to exchange the water about once a day. This obviously depends on the flow rate of your plumbing, and if you have a multi-speed pump, it could get complicated. Either shorter duration, or reduced output should get you to the same place. W/o automated pH/ORP metering, it's going to be trial and error.
    38K in ground pool with attached spa. Current equipment: Easytouch 8 (521150) with IC-60 SWCG with web control by Autelis, 1x Pentair IntelliFlo 011018 pump (for filter), 1x Pentair 2HP WhisperFlo pump (for waterfall), 2X Pentair IntelliBrite 5G 12V lights, Pentair MiniMax400 NG Heater, Pentair SMBW2060 DE filter. Zodiac Barracuda MX8 cleaner on dedicated cleaner line. Lighting/home automation controlled by Insteon/ISY-99i.

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    Re: New pool owner - SWG giving too high of a FC level?

    Thanks to all for the quick and helpful responses. I will check FC when I get home and daily, and wait until the level is below 5 then turn the SWG back on at a 20% setting.
    13500 Gal AG - Hayward Sand Filter

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