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Thread: How to reduce reagent use during slam

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    How to reduce reagent use during slam

    Testing FC and read where you can use half the regular reagent when slamming. How do you do this? Do you put half the water? If so do you multiply drops by 1? Thanks
    16 x 32 Sport Pool; Hayward Series Sand Filter S244T
    15,000 Gallons, In Ground with New Vinyl Liner
    Pool approx. Five Years Old. Live in KY

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    Re: How to reduce reagent use during slam

    You can use a 5 ml sample and each drop equals 1 FC.
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
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    Re: How to reduce reagent use during slam

    Quote Originally Posted by Donldson View Post
    You can use a 5 ml sample and each drop equals 1 FC.
    Thank you
    16 x 32 Sport Pool; Hayward Series Sand Filter S244T
    15,000 Gallons, In Ground with New Vinyl Liner
    Pool approx. Five Years Old. Live in KY

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    Re: How to reduce reagent use during slam

    No problem. I should say more specifically each drop equals 1 ppm since it is 1 for both the FC and CC portion of the test.
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

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    Re: How to reduce reagent use during slam

    For the TF 100 and the Taylor K2006 FAS/DPD chlorine test you can use either a 10 ml sample or a 25 ml sample. It is best to use the 10 ml sample, count the number of R-0871 drops, swirling between drops and when all the pink is gone multiply the number of drops by .5

    You can dilute the test sample by mixing 1/2 pool water with 1/2 unchlorinated water, such as distilled water. Most tap water has small amounts of chlorine in it that would throw off the test result. I would only use this dilution when you are positive the FC is very high, since you will lose some accuracy. For example if slam level is 15 and you accidentally raised FC to 40, you may want to do a dilution test to see if you are still above 15 in a couple of hours. However if you are just trying to maintain slam level at 15 and you have been consistently needing to add 2-5 ppm every couple of hours I would not use the dilution method since you risk undershooting your FC level. When you find the FC drop is only a couple of ppm after two hours then you can try waiting 3 hours for the next test. As the pool clears the time between chlorine additions increases. You will use more reagent up front, but as long as you keep the FC at slam level the quicker the FC will start to hold and require less frequent testing.
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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