Hi,
First time pool owner. After a month with a pool made the mistake of using test strips for CYA and added too much. Then we lost power during the hurricane and hence green pool. Found this helpful website and SLAMMED to get it blue, swam once, and green again. That was my fault bc I didn’t check chlorine after swimming. Meanwhile I ordered the Taylor K-2006 kit to get more accurate readings.
So on Tuesday I started the SLAM process again, this time using the FAS-DPD test 1-2x a day and the PoolMath calculator to take into account CYA. I’ll post that info below. But after 3 days at SLAM levels there was absolutely no improvement in the green color and surprisingly my chlorine levels were relatively stable overnight, which meant the algae wasn’t eating it up. Very confusing.
So my husband took the same sample to the pool store and they registered a chlorine at 5 ppm instead of 20 ppm by my FAS-DPD. Which I guess is why my SLAM wasn’t working. But this really bothers me bc I’m a scientist and work in a lab! So I tested the water again 3x, making sure I’m adding the powder correctly, holding the dropper exactly vertical, trying both the 25ml and 10ml tests. No matter what I did I was still testing near 20ppm which can’t be correct. What gives???
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Test Results 10-08-2021 @ 07:21 AM
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Free Chlorine: 20.0
Combined Chlorine: 0.5
CYA: 55
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Test Results 10-07-2021 @ 05:43 PM
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Free Chlorine: 17.0
Combined Chlorine: 0.5
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Chemical Addition 10-06-2021 @ 04:54 PM
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+ 16 Ounces of CalHypo53
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Test Results 10-06-2021 @ 04:49 PM
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Free Chlorine: 13.5
pH: 7.6
CYA: 42
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Test Results 10-06-2021 @ 07:23 AM
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Free Chlorine: 15.0
Combined Chlorine: 1.0
pH: 7.8
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Test Results 10-05-2021 @ 07:31 PM
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Free Chlorine: 15.0
Combined Chlorine: 0.5
pH: 8.0
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Chemical Addition 10-05-2021 @ 06:29 PM
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+ 24 Ounces of DryAcid
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Chemical Addition 10-05-2021 @ 06:11 PM
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+ 40 Ounces of CalHypo53
------------------------------------------
Test Results 10-05-2021 @ 06:05 PM
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Free Chlorine: 0.5
Combined Chlorine: 0.5
pH: 8.0
Total Alkalinity: 140
CYA: 48
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Test Results 10-02-2021 @ 10:55 AM
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Free Chlorine: 7.5
Combined Chlorine: 0.5
pH: 7.6
Total Alkalinity: 120
Calcium Hardness: 350
CYA: 60
First time pool owner. After a month with a pool made the mistake of using test strips for CYA and added too much. Then we lost power during the hurricane and hence green pool. Found this helpful website and SLAMMED to get it blue, swam once, and green again. That was my fault bc I didn’t check chlorine after swimming. Meanwhile I ordered the Taylor K-2006 kit to get more accurate readings.
So on Tuesday I started the SLAM process again, this time using the FAS-DPD test 1-2x a day and the PoolMath calculator to take into account CYA. I’ll post that info below. But after 3 days at SLAM levels there was absolutely no improvement in the green color and surprisingly my chlorine levels were relatively stable overnight, which meant the algae wasn’t eating it up. Very confusing.
So my husband took the same sample to the pool store and they registered a chlorine at 5 ppm instead of 20 ppm by my FAS-DPD. Which I guess is why my SLAM wasn’t working. But this really bothers me bc I’m a scientist and work in a lab! So I tested the water again 3x, making sure I’m adding the powder correctly, holding the dropper exactly vertical, trying both the 25ml and 10ml tests. No matter what I did I was still testing near 20ppm which can’t be correct. What gives???
------------------------------------------
Test Results 10-08-2021 @ 07:21 AM
------------------------------------------
Free Chlorine: 20.0
Combined Chlorine: 0.5
CYA: 55
------------------------------------------
Test Results 10-07-2021 @ 05:43 PM
------------------------------------------
Free Chlorine: 17.0
Combined Chlorine: 0.5
------------------------------------------
Chemical Addition 10-06-2021 @ 04:54 PM
------------------------------------------
+ 16 Ounces of CalHypo53
------------------------------------------
Test Results 10-06-2021 @ 04:49 PM
------------------------------------------
Free Chlorine: 13.5
pH: 7.6
CYA: 42
------------------------------------------
Test Results 10-06-2021 @ 07:23 AM
------------------------------------------
Free Chlorine: 15.0
Combined Chlorine: 1.0
pH: 7.8
------------------------------------------
Test Results 10-05-2021 @ 07:31 PM
------------------------------------------
Free Chlorine: 15.0
Combined Chlorine: 0.5
pH: 8.0
------------------------------------------
Chemical Addition 10-05-2021 @ 06:29 PM
------------------------------------------
+ 24 Ounces of DryAcid
------------------------------------------
Chemical Addition 10-05-2021 @ 06:11 PM
------------------------------------------
+ 40 Ounces of CalHypo53
------------------------------------------
Test Results 10-05-2021 @ 06:05 PM
------------------------------------------
Free Chlorine: 0.5
Combined Chlorine: 0.5
pH: 8.0
Total Alkalinity: 140
CYA: 48
------------------------------------------
Test Results 10-02-2021 @ 10:55 AM
------------------------------------------
Free Chlorine: 7.5
Combined Chlorine: 0.5
pH: 7.6
Total Alkalinity: 120
Calcium Hardness: 350
CYA: 60