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Thread: should I add cya??

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    should I add cya??

    sacrilege I know but...

    here in Austin the daytime temperature is getting to mid-nineties every day and I'm adding a lot of bleach - 3/4 of a gallon a day. This is going to cost me about $85 to maintain target fc of 5ppm. The water looks perfect, there is no CC and no overnight fc loss so I know it's not a secret algae lurking somewhere.

    pool volume 26000 gallons
    cya is 45ppm.
    FC 6 ppm
    CC 0
    water temperature 88F
    CH 400
    TA 90
    pH 7.5 (this keeps going up and I now add MA 2 x week when pH gets to 7.8)


    I'm going through about 2-3 ppm a day even if nobody goes in the water. If I add some cya or use trichlor tabs will this slow down fc loss? Maybe use some Is it time for me to add borates - which I've never done?
    thank you!
    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    Texas Splash's Avatar
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    Re: should I add cya??

    I lose about 2.5 FC per day just south of you here in SA. So you're right there in a good zone and with a larger pool. Still, if you wanted to, "yes" you could add more stabilizer to help reduce FC loss a little more. I actually have mine at 60 right now with full (blistering) TX sun all day. I might be forced to go to 70 next month. As long as you watch the Chlorine/CYA Chart and adjust your daily FC to ensure it matches your new CYA, you're fine.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    JoyfulNoise's Avatar
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    Re: should I add cya??

    Covering your pool with a solar bubble cover will do a lot more to arrest FC loss than raising CYA. They are a hassle, I know, but my FC loss with a cover on is half what it is with the cover off (probably even better than that if I measured it more accurately).
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: should I add cya??

    My pool here in hot sunny Fort Worth area has the same volume as yours. I raised my CYA to 70. I still have to put 2/3 gallon of 8.25% in daily. So I'm loosing 2ppm per day. About the same as you, perhaps a very small reduction, but not much.
    27,500 gallon in ground gunite/plaster (1995). Attached Spa with fountain, spillway, and 2 lion heads streaming into the pool. Hayward pump and AO Smith UST1152 1.5 hp motor (single speed). Hayward 60 sq ft DE Filter (Model DE-6000). Kreepy Krauly cleaner.

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    Re: should I add cya??

    Quote Originally Posted by JoyfulNoise View Post
    Covering your pool with a solar bubble cover will do a lot more to arrest FC loss than raising CYA. They are a hassle, I know, but my FC loss with a cover on is half what it is with the cover off (probably even better than that if I measured it more accurately).
    I've got a funny shaped pool. Last quote I got for a cover made my eyes water.

    We had a solar cover in france and yes, that worked a treat.

    Can I do a diy one?
    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    JoyfulNoise's Avatar
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    Re: should I add cya??

    Quote Originally Posted by surfbabe View Post
    I've got a funny shaped pool. Last quote I got for a cover made my eyes water.

    We had a solar cover in france and yes, that worked a treat.

    Can I do a diy one?
    I have a freeform pool as well. I followed Mark's DIY project here -

    DIY Solar Cover Roller

    Cost me less than $200 total to do all the work. Not perfect, but it sure does work.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  7. Back To Top    #7

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    Re: should I add cya??

    15k pool in DFW area. My average FC depletion rate for this time of year is about 2.25 - 2.5 per day.

    I usually target my CYA for about 50, testing monthly. The pool gets direct sunlight around to a day.

    The part that interests me is what's considered average for CYA loss for this area of the country. I usually drop about 8-10 CYA per month during the summer months but it's not consistent. Sometimes there's no drop month-to-month.

    Perhaps that's about average for pools in this part of the country but I'm not sure about that.

    I test OCLT about once a month. The last test passed at 0 . I test CC every FC test (FAS-DPD). It's usually at 0, occasionally 0.5 .
    - Pool Type: 15k Gal Gunite IG non-SWG / Built 1988
    - Pump: Pentair Challenger / Sweep Pump: Letro Model LA01N .75HP Single-speed / 6 hrs-day (1 turnover)
    - D.E. Filter: OEM: Nautilus (Pentair) #NS 36 / 36 Sq Ft / D.E. Charge: 3.6 Lb
    - Pentair 4-wheel Sweep LL505G - Booster Pump runs ~2 hrs/day

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    Mod Squad pooldv's Avatar
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    Re: should I add cya??

    An 8 mil solar cover for less than 200 bucks will work great. Just cut to fit with scissors. It will also do wonders to speed warm up in the spring.

    "Average" CYA loss is 3-5 ppm per month. I also have seen more loss some months.

    In TX, AZ and other southern sunny states more CYA is better. Going from 70 to 80 noticeably dropped FC consumption in my pool. Not measured, but I had to turn down my SWG because FC was going up as temp and swimming was going up. Then, I inadvertently raised it to 100 because I was in a hurry and not paying attention , and had to turn my SWG down several times to get FC down below 10. 80-100 is probably going to be my new CYA target. This was in June with 86+ degree water and daily swimming.
    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

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    Re: should I add cya??

    Quote Originally Posted by pooldv View Post
    An 8 mil solar cover for less than 200 bucks will work great. Just cut to fit with scissors. It will also do wonders to speed warm up in the spring.

    "Average" CYA loss is 3-5 ppm per month. I also have seen more loss some months.

    In TX, AZ and other southern sunny states more CYA is better. Going from 70 to 80 noticeably dropped FC consumption in my pool. Not measured, but I had to turn down my SWG because FC was going up as temp and swimming was going up. Then, I inadvertently raised it to 100 because I was in a hurry and not paying attention , and had to turn my SWG down several times to get FC down below 10. 80-100 is probably going to be my new CYA target. This was in June with 86+ degree water and daily swimming.
    I'm not sold on the idea of a solar cover - the pool water is already tepid at 88F and i really don't want the water any warmer.

    I will raise the cya a bit and obviously the fc levels too.

    Is it cheaper to use 12% sodium hypochlorite?
    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    Re: should I add cya??

    Quote Originally Posted by surfbabe View Post
    I'm not sold on the idea of a solar cover - the pool water is already tepid at 88F and i really don't want the water any warmer.

    I will raise the cya a bit and obviously the fc levels too.

    Is it cheaper to use 12% sodium hypochlorite?
    Not always cheaper, but can be more convenient. You'll have to check prices. Walmart still has 10% for $2.50 a jug (121 oz) I believe

    I personally wouldn't use a solar cover either, I'm just south of you in Texas. My water temp is currenlty 94
    15,000 gallon free form Viking fiberglass pool. Hayward Star-Clear Plus C12002 cartridge filter. Hayward Swim Pure Plus T-15 SWG. Testing with TF-100 Kit. 2 speed 1.5HP Supreme pump. Dolphin Nautilus robotic cleaner

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    Re: should I add cya??

    Quote Originally Posted by nlindelldc View Post
    Not always cheaper, but can be more convenient. You'll have to check prices. Walmart still has 10% for $2.50 a jug (121 oz) I believe

    I personally wouldn't use a solar cover either, I'm just south of you in Texas. My water temp is currenlty 94
    Is this walmart own brand?

    Also, I believe my local lesliespool sells 12.5% hypochlorite - do I check for freshness with the date like on the grocery store bottles?
    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    epro05's Avatar
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    Re: should I add cya??

    12.5% degrades at a faster rate than 8.25%, so it is very important to check the date. You can review this chart.

    My local Leslies told me that Leslies stores in Texas do not sell liquid chorine. If yours does, please confirm.

    http://
    27,500 gallon in ground gunite/plaster (1995). Attached Spa with fountain, spillway, and 2 lion heads streaming into the pool. Hayward pump and AO Smith UST1152 1.5 hp motor (single speed). Hayward 60 sq ft DE Filter (Model DE-6000). Kreepy Krauly cleaner.

  13. Back To Top    #13

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    Re: should I add cya??

    Pool temps will likely be too hot using a cover in the summer. Many friends in houston are trying to cool their pools because they are too warm (without a cover on them).
    18,000 gunite pool/spa combo. Pebble tec, iaqualink rs8, cl580 filter, aquapure 1400, 400k btu lx heater, 10 solar panels, jandy 1hp, 1 1/2hp, and 2hp stealth pumps for circ, spa, waterfall

  14. Back To Top    #14

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    Re: should I add cya??

    The solar covers only heat a pool by trapping the heat in the pool overnight when normally a pool loses a lot of it's heat. Your pool is getting hotter during the day whether you cover it or not.

    So, if you don't want it to heat your pool, but you want to prevent FC loss, put the cover on during the day, and take it off at night. If you want to heat the pool, leave it on at night.

    17,500 gallon IG Vinyl
    Pentair Tagelus TA60D Sand filter
    Pentair Challenger 1.5HP pump CFII N1 1.5A
    Taylor K-2006-A, Stenner 45MPHP10 auto chlorine feed

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    Re: should I add cya??

    Evaporation happens more in the day than night if warmer. Evaporating water is what cools the pool regardless of day or night.
    18,000 gunite pool/spa combo. Pebble tec, iaqualink rs8, cl580 filter, aquapure 1400, 400k btu lx heater, 10 solar panels, jandy 1hp, 1 1/2hp, and 2hp stealth pumps for circ, spa, waterfall

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    Re: should I add cya??

    Thanks for the table epro5.

    2 of my local Lesliespool sell liquid chlorine here in NW Austin. There might be more but these 2 are local to me.
    The first one gets a weekly delivery of 10% chlorine - it is kept in the store in the air-conditioned space. They had some very recent dates. The guy I spoke to was knowledgeable and knew that it needed to be kept cool. It was $18.99 for 4 gallons.

    The other store were pretty useless, the date on the one they brought out of the non-air-conditioned space (95F outside) was old and he couldn't be bothered to check the price for me but "thought" it was $14.99 I wouldn't touch that with a barge pole.

    I went and did a cost comparison and my HEB bleach still comes out considerably cheaper.

    I've added a floater with some trichlor pucks in to add chlorine and to bring up cya a bit.
    26,390 gallons IG, Centex plaster, Hayward DE 4820 filter, Century Centurion B2859 pool pump motor.
    Booster pump for polaris 280
    Spa
    Built 1997

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    Texas Splash's Avatar
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    Re: should I add cya??

    My HEB sees me coming a mile away.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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