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Thread: Chlorine Consistently Rising

  1. Back To Top    #1

    Join Date
    Jun 2016
    Fort Mill, South Carolina

    Chlorine Consistently Rising

    Good Morning,
    Joined the group in June and you guys helped me maintain a Trouble Free Pool all summer long. Lately, however, my chlorine levels have risen without adding chlorine to the point of 10.8 this morning. I had seen it in the 7 and 9 range in the last couple of weeks. The 10.8 this morning was after draining about 4 inches of water yesterday from the Hurricane Matthew rains. Below I have listed my other readings. Is this normal (obviously temperatures have been dropping)?

    Chlorine 10.8
    pH 8
    alkalinity 60
    calcium hardness 350
    CYA 90
    Salt Generator set @ 50% reads 3,100 ppm (this usually reads 3,300-3,500)

    For what it's worth, I swam last week at the 9 chlorine range and eyes were fine. Thanks for the help.
    Thanks for the help! Great site.
    21,640 gallon 17x34 Pebble Tec IG saltwater pool installed May 2016
    Jandy E Pump 2.7HP, Aquapure 1400 SWG
    Jandy Cartridge Filter CV340, JXi 400 Pool & Spa Heater
    Taylor K2006 Test Kit

  2. Back To Top    #2
    Mod Squad
    Join Date
    Aug 2012
    DFW, TX

    Re: Chlorine Consistently Rising

    It is safe to swim with FC up to shock level for your CYA, FC/CYA Chart.

    FC levels can only rise if something or someone is adding chlorine to your pool. If it isn't you adding chlorine then it must be your neighbor. If the FC level is rising and you are saying the SWG is on but the output percentage hasn't been changed then that is normal. As water temp drops FC consumption also drops. Also as the water temp drops the salt level reading in the cell will drop.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  3. Back To Top    #3
    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    Re: Chlorine Consistently Rising

    Time to dial back the SWG a bit.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
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  4. Back To Top    #4

    TFP Guide
    Jimrahbe's Avatar
    Join Date
    Jul 2014
    Bedford, TX

    Re: Chlorine Consistently Rising

    You have to adjust the percent of SWG output or reduce the hours the pump runs to reduce the amount of chlorine generated. There is no feedback in this system, the SWG will produce the same amount of chlorine no matter how much chlorine is still in the water. You are the feedback system.. you test the chlorine and adjust the output to keep your FC level where you want it.

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP5200 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2.

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