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Thread: borates and high CYA

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    Join Date
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    borates and high CYA

    I started using the BBB method one month ago. My first set of tests results with the K2006 kit were
    FC2.6
    cc.2
    ph 7.6
    ta 140
    ch 190
    cya 360

    Based on recommendations from this site I did a partial drain. After refilling slammed and raised CH.

    New results as of this morning
    FC 9
    cc.4
    ph 7.6
    TA 100
    ch 300
    cya 140
    borates 40???

    I enjoy this site and have done numerous searches about various subjects. I feel more comfortable each day compared to where I started, but know I am still learning. I was reading about borates and found that Proteam Supreme falls into that category. The pool builders store that I previously frequented always had me add this product each year. So I ordered the borate test strips from TFTEST to see if I had any left in the pool. I have to admit to having difficulties with determining the color difference between 50 and 80. I would describe the color as a pale tan. Not as dark as the 50 or 80 on the bottle. So my question is, how much borates I really have, and with the high CYA level, can my FC level be lower? I have been using polyquat 60 weekly, but I think I read that with Borates I don't need to use this. I am doing longer backwashes, and a possibility of rain this week will allow me to drop pool level some as well. I will do another partial drain once water restrictions ease to lower the CYA level. Also the water is crystal clear, with no signs of algae. The pool is in full sun from 10 am till 6 pm. My chlorine usage is about 2 quarts a day to maintain a fc 9
    2009 19k, IG, Quartzscape negative edge w/waterfall, 8' raised spa w/waterfall ,Pentair WF28 2hp, Jandy 1.5hp pump for water fall feature, Polaris 280 cleaner with booster pump,400,000 Jandy LXI heater, Jandy DE 60 filter.

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    Wildcat's Avatar
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    Re: borates and high CYA

    Bsed on what the forum tells me your CYA is still very high. FC of 9 is too low for that CYA, I think it needs to be more like 14-18.

    Why are you using Polyquat? BBB teaches to control algae only with CL.

    Why are you concerned about your borate level? It has never come up in any discussions I have had so far.

    Sounds like still have some level of pool store love
    10000 Gal, IG Pebbletec, pop up cleaners,Hayward EcoStar VS, 425 sq ft Hayward Cartridge, waterfall feature

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    JasonLion's Avatar
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    Re: borates and high CYA

    With CYA at 140 you want the FC level to between 11 and 17, and never lower than 11 (unless you have a SWG). However, none of the CYA tests are at all precise at levels over 90, so you might want to err on the high side of that range.

    I recommend replacing more water, until CYA is below 100 at the very least, and ideally around 60.

    None of the borate tests are all that easy to read. Your level should be fine for the rest of the season. Measure it again in the spring and see where you are then.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Wildcat's Avatar
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    Re: borates and high CYA

    so-you-want-to-add-borates-to-your-pool-why-and-how-t4921.html

    You were right on borates according to the link above. I still have more to learn.

    Forgot to mention, you CC number i believe there is still something in your pool and the CL is fighting it. I am sure an expert will weigh in shortly
    10000 Gal, IG Pebbletec, pop up cleaners,Hayward EcoStar VS, 425 sq ft Hayward Cartridge, waterfall feature

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    Re: borates and high CYA

    I was just curious if the Borates helped fight the algae and FC could be slightly lower due to the borates.
    2009 19k, IG, Quartzscape negative edge w/waterfall, 8' raised spa w/waterfall ,Pentair WF28 2hp, Jandy 1.5hp pump for water fall feature, Polaris 280 cleaner with booster pump,400,000 Jandy LXI heater, Jandy DE 60 filter.

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    linen's Avatar
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    Re: borates and high CYA

    Borates do act like a mild algaecide, but we still recommend maintaining the FC level the same as a pool without borates. It is possible that you might notice a slight decrease in chlorine consumption, but I never have.
    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: borates and high CYA

    Your borates level sounds like it might be below 50 and if that's the case then the algaecide effect will be significantly diminished. It's mild at 50 ppm and fairly strong at 80 ppm, but below 50 (say at 30 or below) it may not have a noticeable effect. It seems pretty wasteful to add more borates only to have the water diluted to get the CYA lower which will also lower the borates level. Why not just bite the bullet and do the partial drain/refill to get your CYA level lower? If you don't want to do that, then use a higher chlorine target level in which case you won't need the Polyquat 60. Or you can stay with your current high CYA and weekly Polyquat until you perhaps dilute the water with winter rains.
    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: borates and high CYA

    Thanks I was not intending to add more borates. I was just curious if that helped with the algae and then the FC level could stay below 10 to test for ph. I will stay on top of everything till my next drain. Thanks for the quick responses
    2009 19k, IG, Quartzscape negative edge w/waterfall, 8' raised spa w/waterfall ,Pentair WF28 2hp, Jandy 1.5hp pump for water fall feature, Polaris 280 cleaner with booster pump,400,000 Jandy LXI heater, Jandy DE 60 filter.

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