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Thread: Should I add stabilizer?

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    Should I add stabilizer?

    Hi - I'm in my first year of being a pool owner and maintaining on my own. Pool is only 3 months old. I have been testing every week and it seems as though my CYA levels are continuing to decrease (from about 70 at the beginning and today tested at 40).

    The other test results today are below. I'm planning to add the recommended acid to lower PH but should I also add stabilizer? Is there an issue if CYA runs low but no problem with keeping chlorine level ok?? I am only running the SWG at between 40-50 and the chlorine levels have been easily staying above 5 first thing in the morning and mostly around 7. Please let me know your thoughts! Thanks!

    FC: 10
    CC: 0
    PH: 8.2
    TA: 110
    CYA: 40
    16k IG pool/spa, IntelliFlo VS, IntelliChlor SWG, Easytouch, MasterTemp 400HD, clean & clear RP cartridge filter, kreepy krauler great white

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    Mod Squad pooldv's Avatar
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    Re: Should I add stabilizer?

    Pools lose 3-5ppm CYA per month. You'll want CYA in the 70-80 range by summer.
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    Mod Squad Jimrahbe's Avatar
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    Re: Should I add stabilizer?

    Russ,

    There is no problem doing what you are doing, but it is making you drive your SWCG much harder than you need too. I would guess if your CYA were in the 70 to 80 range you would be able to run your SWCG at 20 or 25% this time of year.

    So, while it is not an emergency situation, I would add some more CYA when you get a chance.

    In "theory" CYA does not just go away, so are you having to add a lot of water to your pool?

    As a side note... I see we have very similar systems. If you don't already have ScreenLogic2, I highly recommend it.

    Thanks,

    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, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Caldera Spa.

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    Re: Should I add stabilizer?

    You CYA is fine if you are able to maintain FC. The higher CYA levels suggested for SWG is at least in some part to protect the FC so the SWG does not have to work as long or as hard. The bigger question is why is the CYA coming down so quickly have you had a lot of rain and had to drain a lot of water? Does your pool have an auto fill and if so how does your water bill look at this time of year your pool should just now be using more water due to evaporation. You should have used very little water to fill over the last 3 months. If you do have an auto fill you may want to turn it off and do a bucket test just to be sure you don't have a leak in the plumbing somewhere.
    12,300 Gallon, IG PebbleFina, 3 ft sheer, 2 Jandy nicheless LED lights, Jandy Pro 1.5HP VS pump (A.O. Smith Motor), PB4-60 Booster pump, Polaris 280, Jandy cv340 cartridge filter, Zodiac Z4 control panel W/iAquaLink, Stenner pumps for chlorine & MA connected to WiOn WiFi switches, TF-100. You can support TFP with AmazonSmile just click the link!

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    Re: Should I add stabilizer?

    Thank you for all the quick responses. I have had to add water - about 1-2 inches up about every 2 weeks. I have been running the three waterfalls almost every day all day as the pool GC suggested I run them frequently over the first few months given it's brand new. Also, we have had zero rain so maybe that is pulling the CYA levels down?

    Thanks again.

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    Mod Squad Jimrahbe's Avatar
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    Re: Should I add stabilizer?

    Russ,

    Running your waterfalls causes aeration which in turn causes your pH to increase...

    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, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Caldera Spa.

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    Re: Should I add stabilizer?

    1 to 2 inches does not sound unreasonable so I doubt you have a leak. You should have lost about 15ppm or so in the last 3 months the rest could probably be chalked up to testing interpretation.
    12,300 Gallon, IG PebbleFina, 3 ft sheer, 2 Jandy nicheless LED lights, Jandy Pro 1.5HP VS pump (A.O. Smith Motor), PB4-60 Booster pump, Polaris 280, Jandy cv340 cartridge filter, Zodiac Z4 control panel W/iAquaLink, Stenner pumps for chlorine & MA connected to WiOn WiFi switches, TF-100. You can support TFP with AmazonSmile just click the link!

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    Re: Should I add stabilizer?

    Great. Thank you all for the help. I'll add some CYA but I won't go crazy with it. I'm curious to see how the pool chemistry changes as it heats up here in Tampa and we use it more over the coming months.
    16k IG pool/spa, IntelliFlo VS, IntelliChlor SWG, Easytouch, MasterTemp 400HD, clean & clear RP cartridge filter, kreepy krauler great white

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    Mod Squad pooldv's Avatar
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    Re: Should I add stabilizer?

    1/8"-1/4" per day is a normal evaporation rate.
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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

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