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Thread: Best Way To Raise CYA

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    Best Way To Raise CYA

    I use to have a high CYA & now because of Rain & strictly using Liquid Chlorine, My CYA is below 20.
    Because of such a Low CYA reading, I'm going through Chlorine by the Gallons. I looked in Pool School for the answer, but did not find.
    I apologize if this question has been answered 1000 times on here.
    20' X 40' Rectangular Gunite Pool with Spa
    28,000 Gallons
    Sand Filter
    Rainbow Chlorinator
    Penair Pump
    Polaris 280

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    pwrstrk's Avatar
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    Best Way To Raise CYA

    Use granular stabilizer. Put it in a sock and hang it in front of a return, run pump until its all dissolved. It will take up to a week to fully register on a test. I use the stabilizer you can get at Walmart. There is also liquid stabilizer but it is pricey.

    Use the pool calc to figure out the amount you need to add.
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Charlie_R's Avatar
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    Re: Best Way To Raise CYA

    Fill an old sock with the CYA granules and hang in front of a running return. How much to add you can figure with pool calculator.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: Best Way To Raise CYA

    You have several options for raising your CYA level:

    1) Buy pure CYA (aka stabilizer or conditioner), put it into a sock or stocking and hang it over a return. This will take a day or two to get your CYA level up (it can still slowly rise a bit after that). If you were to put it into your skimmer and have it caught in the filter, then it could take up to a week to register. The sock method usually registers most of the CYA soon after it is no longer in the sock/stocking.

    2) Buy Natural Chemistry® Instant Pool Water Conditioner which will immediately increase the CYA level. However, this is more expensive since 1 gallon for $37 at Leslie's would raise the CYA by 36 ppm while 10 pounds of GLB Stabilizer at poolgeek.com is $36.19 but raises the CYA by 120 ppm so the Instant Pool Water Conditioner is over 3 times as expensive.

    3) Use Trichlor tabs as a source of chlorine. For every 10 ppm FC added by Trichlor, it also increases the CYA by 6 ppm. However, this will raise the CYA slowly. At 2 ppm FC per day, this is a CYA increase of 8.5 ppm per week. This option only makes sense if you already have leftover Trichlor tabs that you want to use up.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: Best Way To Raise CYA

    OK. Funny how just in April I was trying to get my CYA down from 90 & now I have to Raise it.
    Thanks. I will research Prices & Product you both suggested. Don't have any Tabs but I do have a box of Walmart Pool Essentials Shock, would that raise it?
    20' X 40' Rectangular Gunite Pool with Spa
    28,000 Gallons
    Sand Filter
    Rainbow Chlorinator
    Penair Pump
    Polaris 280

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    Charlie_R's Avatar
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    Re: Best Way To Raise CYA

    If it is dichlor, yes. At the bottom of pool calculator you will see the section that shows you what each addition will do. If it is cal hypo, no. Read the label.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: Best Way To Raise CYA

    Think this has Trichlor from what I remember. I have to go pull it out & see.
    http://www.wal-mart.com.cn/ip/Pool-Esse ... k/19795892
    20' X 40' Rectangular Gunite Pool with Spa
    28,000 Gallons
    Sand Filter
    Rainbow Chlorinator
    Penair Pump
    Polaris 280

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    Charlie_R's Avatar
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    Re: Best Way To Raise CYA

    I can't quite read the label in their pic, but one of the reviews claims it is trichloro. So check pool calculator and see how much your CYA will rise along with the FC. From what some of the other reviewers wrote, it doesn't like to dissolve very quickly, so sock method would be appropriate for this, I think. As long as there is no mention of copper or other minerals in the ingredients list.

    Best would be to go to Walmart and get a jug of CYA, that way you are only changing the CYA, and not raising your FC at the same time. Not saying that would be a bad thing, but controlling one thing at a time is best.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: Best Way To Raise CYA

    The MSDS indicates it is 53.5% Trichlor but it contains 25-30% "Trade Secret 031" and 4-6% "Trade Secret 001" that are unknown, but "Trade Secret 031" has the same ecological info as sodium sulfate and "Trade Secret 001" has the same ecological info as aluminum sulfate.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Charlie_R's Avatar
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    Re: Best Way To Raise CYA

    Hmmm might not be a good thing for a pool at all, then. Thanks for the clarification chem geek!
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: Best Way To Raise CYA

    I find it unbelievable they actually put something in there & call it Trade Secret. ****, that could be ANYTHING!! I know there are people who have complained it died their Liners. Guess I'll wait & get something better like the Natural Conditioner mentioned. I put 2LBs of Cal-Hypo in just to keep Chlorine up. I know IT adds Calcium. I could use a little anyway. Thanks for the help.
    20' X 40' Rectangular Gunite Pool with Spa
    28,000 Gallons
    Sand Filter
    Rainbow Chlorinator
    Penair Pump
    Polaris 280

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    linen's Avatar
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    Re: Best Way To Raise CYA

    Quote Originally Posted by dino1956
    OK. Funny how just in April I was trying to get my CYA down from 90 & now I have to Raise it.
    Going from 90 to 20 with just rainwater that lands in the pool is unlikely, even if you additionally had some splashout. Have you been having to add a lot of makeup water...could you have a leak?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Best Way To Raise CYA

    I have a couple leaks. I lose an Inch or so every 2-3 days. Need to get that fixed. But it came in handy for getting my CYA down.
    20' X 40' Rectangular Gunite Pool with Spa
    28,000 Gallons
    Sand Filter
    Rainbow Chlorinator
    Penair Pump
    Polaris 280

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    linen's Avatar
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    Re: Best Way To Raise CYA

    Ahhh...it is feasible that you could reduce cya over a long period with a decent leak like that, but as you are probably aware, it is taking a ton of water to do it that way (and not fix the leaks).
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Best Way To Raise CYA

    True. Like I said, I need to get the Leaks Repaired.
    20' X 40' Rectangular Gunite Pool with Spa
    28,000 Gallons
    Sand Filter
    Rainbow Chlorinator
    Penair Pump
    Polaris 280

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    Re: Best Way To Raise CYA

    So, if I have a 15k gallons, FC ~2-3 and CYA 20 or less. Still have some Trichlor 94% tabs. Would like to get CYA to ~40. Could I just put 1 or 2 tablets in the tablet chute and allow to dissolve over next couple of days? I appreciate that it will take several days for the CYA to come up.

    Or, maybe after reading the CYA chart again, I should well enough alone as with the CYA that low, my minimum FC level is also so low. And since I travel a fair amount, this leaves more of a window of comfort in case my wife slips a bit when I'm away,...

    Thanks for any thoughts.
    15k gallons / IG / PebbleSheen / Cartridge Filter / 1.5HP dual speed pump / Built Aug 2010 / Spa / TigerShark cleaner

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    sargent's Avatar
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    Re: Best Way To Raise CYA

    Using trichlor tabs is an acceptable way of adding CYA. Look at PoolMath to figure out how much you need to add.
    14k gal IG vinyl, Jandy Flopro 1 hp up-rated, 2 spd pump, Hayward 325 sq ft cartridge filter, Circupool Si-40 SWCG

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    Re: Best Way To Raise CYA

    Thanks Sargent. Or should I leave as is?
    15k gallons / IG / PebbleSheen / Cartridge Filter / 1.5HP dual speed pump / Built Aug 2010 / Spa / TigerShark cleaner

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    Re: Best Way To Raise CYA

    That's the thing, using tabs when you have a need is perfectly acceptable, as long as you know what it will do. Since you are using chlorine at a rapid rate, it appears to me you will solve two problems at once. Keep an eye on your pH.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: Best Way To Raise CYA

    So, Robbie, are you saying I should drop a puck or 2 in the tablet chute? And then monitor all levels?
    15k gallons / IG / PebbleSheen / Cartridge Filter / 1.5HP dual speed pump / Built Aug 2010 / Spa / TigerShark cleaner

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