Very high chlorine readings for several weeks

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baslingtons

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Apr 6, 2008
4
Spokane
IMG_1657.JPGWe are seeing very high readings of chlorine from the daily test kit. Haven't added any chlorine for many weeks and keep monitoring. Seems FC/CC is coming down, but very slowly. We've been keeping the solar cover off during the day so we have good sun exposure. (live in Washington state so cool nights).

Had problems earlier this year with low PH and high Alkalinity, but have managed to bring PH up with varying Borax and Washing Soda. 8/3 we added 1 gal Muratic Acid (31.45%) to work to bring Alkalinity down. Had forgotten the advise of the forum over the past year and made the mistake to use CHEAP chlorine pucks in stead of liquid :(

Don't understand why chlorine stays so high and suspect something else the problem.

Todays readings
Basic chlorine test -- color orangish-red off the chart. Using the PH colors as an indicator it is around a 7.5 color.
PH - 7.2
FC - 25
CC - 0
Alkalinity - 150
Calcium - 190
CYA - 120 (hard to know since markings start at 100)
 
baslingtons said:
View attachment 114469We are seeing very high readings of chlorine from the daily test kit. Haven't added any chlorine for many weeks and keep monitoring. Seems FC/CC is coming down, but very slowly. We've been keeping the solar cover off during the day so we have good sun exposure. (live in Washington state so cool nights).

Had problems earlier this year with low PH and high Alkalinity, but have managed to bring PH up with varying Borax and Washing Soda. 8/3 we added 1 gal Muratic Acid (31.45%) to work to bring Alkalinity down. Had forgotten the advise of the forum over the past year and made the mistake to use CHEAP chlorine pucks in stead of liquid :(

Don't understand why chlorine stays so high and suspect something else the problem.

Todays readings
Basic chlorine test -- color orangish-red off the chart. Using the PH colors as an indicator it is around a 7.5 color.
PH - 7.2
FC - 25
CC - 0
Alkalinity - 150
Calcium - 190
CYA - 120 (hard to know since markings start at 100)
Click to expand...
Is your chlorine reagent fresh ? Perhaps it’s expired
 
If you have the TF-100, the FAS DPD test is the first one on the instruction card. You are using the OTO test which doesn't test above 5ppm FC, and does not test for CC.

Also, you'll need to do a dilution CYA test. Mix 50% tap water with 50% pool water. Then run the CYA test as instructed, and multiply by 2. It should give you a far more accurate CYA number. Over 100 is too high, but after your diluted test you'll know better how much to drain and refill to lower it.
 
"Had problems earlier this year with low PH and high Alkalinity, but have managed to bring PH up with varying Borax and Washing Soda. 8/3 we added 1 gal Muratic Acid (31.45%) to work to bring Alkalinity down. "

Muric Acid lowers PH!!
 
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