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Thread: Bio-Active CYA Reducer Test

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    Bio-Active CYA Reducer Test

    I am new to the site, but have been lurking for a few weeks. I just bought a house that has a pool, despite not wanting that kind of responsibility. This pool has been a bit of a crapshoot and tough for me to get a handle on. All that being said, I have come to understand that I have much too much CYA. I have drained and refilled more than 60% of the pool, but the CYA is only down to 100ppm. I cannot sustain another refill so I have resorted to trying the new Bio-Active CYA Reducer. I have my levels in the right place and wanted to walk you guys through what is happening. One thing I didn't know beforehand was that you have to keep your FC levels at 2-3ppm in order for the enzymes to work.

    I started the enzymes tonight at 7pm and the pump has to run for 4 hrs. I will update as time progresses, but has anyone else tried this product with success?

    My Levels:
    FC: 3
    PH:7.6
    TA:110
    CH: 400
    CYA: 100

    I really hope this works.
    28K gal, plaster, IG, Hayward 3620 DE Filter, Zodiac MX8 suction pool cleaner, one skimmer

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    Re: Bio-Active CYA Reducer Test

    Welcome to TFP!

    Actually, the FC stops the enzymes and bacteria so if you are going to err, you want to be on the low side for FC. Also, you might drop your pH a little bit (perhaps to 7.4).

    We've had terrible results for this product -- only a few people saw any drop in CYA at all and most people saw no change. If you can't return the product and want to try it out anyway, then yes please let us know what happens. Do you have one of our recommended test kits? If not, you should get that before doing the test so that you'll know your results are accurate.
    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: Bio-Active CYA Reducer Test

    So do you think i should lower my FC further? I have a simpler test kit with test strips but i have a TF-100 in the mail. My first readings were from the pool store. I just couldn't wait any longer after fighting this pool for 2 months and feeling like I'm losing.

    I wonder how the company got the "test" results they claim on the package?

    Thanks for the warm welcome. This site has been valuable so far and I only wish I had found it before buying tablets from the pool store. I think I will try and garage sale the rest of them so it isn't a total loss.
    28K gal, plaster, IG, Hayward 3620 DE Filter, Zodiac MX8 suction pool cleaner, one skimmer

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    epro05's Avatar
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    Re: Bio-Active CYA Reducer Test

    Welcome fnymann. I'm in Keller, down the road from you.

    When you get the TF-100 you should recheck your CYA as it may be well over 100ppm (the test can't read over 100 accurately, and pool store testing will report it as 100, even if it's well over 100).

    You can dilute a sample of pool water with an equal amount of tap water or distilled water (1:1 dilution), then multiply your CYA test results by 2.

    FYI, my CYA dropped from 80 last year to 50 this year due to rainfall dilution, backwashing etc. With our hot sunny weather 50ppm CYA is OK as it helps reduce daily FC loss.

    I would just keep the tablets. If you go on vacation for a few days it is a way to keep the FC up while you are gone.
    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: Bio-Active CYA Reducer Test

    So the moment we have all been waiting for...the update. On July 1st, i put the CYA reducer in the pool. The next day i check the FC and PH to be sure.

    Day #1
    FC: 1
    PH: 7.6

    I took the advice of epro05 and decided to let the pool go full green and not add any chlorine, but did add a bit of muriatic acid to slightly reduce the PH.

    Day #2 - I spent 4 hours cutting the yard and didn't care to check FC or PH b/c i figured i would let the pool do its own thing.

    Day #3 - Since i didn't have my TF-100 kit yet, i let the pool store tell me what's what
    FC: 0
    CYA: 90
    TA: 110
    PH: 7.6

    I was bummed at this point b/c i read from other that the biggest change happened in the first 48 hrs, but i figured it was my luck. The weirdest thing thus far was the pool was still clear and algae free at this point.

    Day #4 - Did other stuff around the house and figured i'd wait until monday to check the levels again. The pool started to have a green tint with just the slightest bit of algae.

    Day#5: TF-100
    FC: 0
    PH: 7.8
    TA: 120
    CYA: 60ish

    The pool is becoming much more green and the filter pressure has gone up 15 even though i backwashed 2 weeks ago. I was very happy to see the CYA significantly lower, but i am a bit skeptical about my pool chemistry skills. I plan to take a sample to the pool store for a double check and then i will slam the pool to clean it up. I do have a question about that process though...how do i handle the increase filter pressure with the slam? Do i need to backwash first, then slam? Will I have to backwash again after it is all done?

    Thanks for listening
    28K gal, plaster, IG, Hayward 3620 DE Filter, Zodiac MX8 suction pool cleaner, one skimmer

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    Mod Squad tim5055's Avatar
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    Re: Bio-Active CYA Reducer Test

    Quote Originally Posted by fnyman66 View Post
    The pool is becoming much more green and the filter pressure has gone up 15 even though i backwashed 2 weeks ago. I was very happy to see the CYA significantly lower, but i am a bit skeptical about my pool chemistry skills. I plan to take a sample to the pool store for a double check and then i will slam the pool to clean it up. I do have a question about that process though...how do i handle the increase filter pressure with the slam? Do i need to backwash first, then slam? Will I have to backwash again after it is all done?

    Thanks for listening
    I trust you r numbers more than the pool store as long as you are using a quality test kit. During a SLAM you may have to clean the filter multiple times. The filteris designed to capture the junk suspended nt he water and as you SLAM there will be a lot of that. Just backwash when the pressure rises 25% over clean pressure.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Mod Squad jblizzle's Avatar
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    Re: Bio-Active CYA Reducer Test

    I agree with Tim. Unfortunately, given the that pool store testing, especially for CYA, has proven in the past to be entirely unreliable and inaccurate and not repeatable, I would not feel comfortable drawing any conclusions from these results.

    Was the CYA really 90ppm after a day? There are posts where the pool store has provided CYA levels of 40ppm for tap water where we know it is 0ppm. And others that would report 40ppm CYA when the TF-100 found it to be in the 100s. For all we know, the TF-100 may have given you a result of 60ppm at the start as well.

    Happy that you have a reasonable CYA level. But, I would not classify this as a success for the BioActive product given the mixing of testing methods.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Re: Bio-Active CYA Reducer Test

    My thought with taking the water sample to the pool store was if their CYA test came in below 90, i would trust that my test was accurate. I am thankful I got some good advice at the beginning of the process and it seems to have been the difference.

    The only trouble I had with my new TF-100 was 1 or 2 of the solutions were not making normal size drops. They were itty bitty and throwing me off. It was for CH and TA that I had this problem.
    28K gal, plaster, IG, Hayward 3620 DE Filter, Zodiac MX8 suction pool cleaner, one skimmer

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    Mod Squad jblizzle's Avatar
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    Re: Bio-Active CYA Reducer Test

    That is a known problem with the TA reagent because it is so fresh, there is still a static build up. That is why the instructions say to wipe the tip between drops. This will go away after a few tests.

    I have not heard of this for the CH though. But, I know the purple dye reagent drops always seem to be smaller. This does not matter and you can add more drops for a deeper color if you want.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  10. Back To Top    #10

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    Re: Bio-Active CYA Reducer Test

    I'm kicking myself now b/c i read the warning slip with the kit and then had a brain fart. Thanks for the reminder!
    28K gal, plaster, IG, Hayward 3620 DE Filter, Zodiac MX8 suction pool cleaner, one skimmer

  11. Back To Top    #11

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    Re: Bio-Active CYA Reducer Test

    ah, we should have had you set aside a few cups of the pool water before you did anything, so we could test the original CYA once the kit arrived.
    10,500 gal IG, Topaz Pebble, auto-level
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  12. Back To Top    #12

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    Re: Bio-Active CYA Reducer Test

    That is on me, but i did use some test strips for ball park numbers and those showed the CYA to be over 100. I had time at lunch and took a water sample to the pool store and was told CYA was about 80. Of course his badge said trainee!
    28K gal, plaster, IG, Hayward 3620 DE Filter, Zodiac MX8 suction pool cleaner, one skimmer

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