My CYA is 50. My daughter has added 6 gallons of commercial 10%+ bleach in the past ten days PH is 7.4. She is barely is getting a chlorine reading. What is going on? I'm on vacation she is trying to take care of pool while I'm gone. No algae whatsoever. 10,500 gallon Intex 16x32 above ground pool. It has been used for 3 years now.
HELP 6 gal of chlorine still shows 0
- Thread starter dannybye1
- Start date
kul
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- Oct 1, 2021
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- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
The Chlorine/ph test kit that comes with the super chemicals test kit we buy on here recommended by the pool school
kul
Bronze Supporter
- Oct 1, 2021
- 1,434
- Pool Size
- 15000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
kul
Bronze Supporter
- Oct 1, 2021
- 1,434
- Pool Size
- 15000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
She had to go to work. so I'll have to walk her through the testing. I use nothing but muriatic acid or arm and hammer baking soda when I'm at home. She has been taking care of the pool for 2 months now. The home is used as a vacation rental. Could something have been put in the pool by a guest? Everything has been fine since the past 10 or so days.
I've read something about chlorine lock? She also said it's a tiny bit cloudy and is getting crystal clear soon after she adds the bleach
Its a made up term to explain improper chemistry. The higher your CYA, the more chlorine you need to sanitize at the same level. At 100+, one needs far more chlorine than they're adding, appearing what they're adding is 'locked'
Algae grows exponentially and you likely have a mild bloom sitting on the line of being visible. The last few growth cycles are the difference between clear water algae and a full blown swamp. Many times, folks keep it barely at bay thinking they won the battle when it's just lying in wait for any slip up.
You need to SLAM Process.
Before she left today she put in over 3 gallons pool math says that is slam/shock value ... so we'll see what happens
Check this again.
Are you testing for FC and CC within 20 minutes of adding the chlorine?
kul
Bronze Supporter
- Oct 1, 2021
- 1,434
- Pool Size
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- Chlorine
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- Pentair Intellichlor IC-60
Would be helpful if she checked after maybe 3-4 hours to see how fast it’s going down.
She should also do an OCLT test and run all the tests. In the heat with full sun and a lot of people, a lot of chlorine could be consumed. Do you also use tabs in addition to the liquid chlorine?
Overnight Chlorine Loss Test
She should also do an OCLT test and run all the tests. In the heat with full sun and a lot of people, a lot of chlorine could be consumed. Do you also use tabs in addition to the liquid chlorine?
Overnight Chlorine Loss Test
She'll have to check the pool when these vacation guest coming in leave. I'll face time with her and walk her through the testing. Starting with a CYA retest.
kul
Bronze Supporter
- Oct 1, 2021
- 1,434
- Pool Size
- 15000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
How long are they staying? If the algae is not dealt with, the pool may go green while they are there which might be a problem.
If the CYA has dropped by a lot and you are getting CCs and the pH and TA are going down when you add liquid chlorine, then you probably have ammonia.
More than 95% of ammonia is in the form of the ammonium ion (NH4+)
4NH4+ + 3HOCl + 3OCl- --> 2N2 + 6H2O + 7H+ +6Cl-
When adding 12.5% sodium hypochlorite (liquid chlorine) to a pool to oxidize ammonia, every gallon of liquid chlorine will create the equivalent of 15 ounces of 31.45% hydrochloric acid.
10 gallons of 12.5% liquid chlorine added to 25,000 gallons of pool water with ammonia will lower the TA by about 23 ppm or the equivalent of adding 150 ounces of full strength 31.45% muriatic acid.
Every 8.53 gallons of 12.5% liquid chlorine is equivalent to about 1 gallon of 31.45% acid.
www.troublefreepool.com
Why Does pH drop When Treating Ammonia With Liquid Chlorine?
Oxidizing ammonia creates acid by releasing hydrogen.More than 95% of ammonia is in the form of the ammonium ion (NH4+)
4NH4+ + 3HOCl + 3OCl- --> 2N2 + 6H2O + 7H+ +6Cl-
When adding 12.5% sodium hypochlorite (liquid chlorine) to a pool to oxidize ammonia, every gallon of liquid chlorine will create the equivalent of 15 ounces of 31.45% hydrochloric acid.
10 gallons of 12.5% liquid chlorine added to 25,000 gallons of pool water with ammonia will lower the TA by about 23 ppm or the equivalent of adding 150 ounces of full strength 31.45% muriatic acid.
Every 8.53 gallons of 12.5% liquid chlorine is equivalent to about 1 gallon of 31.45% acid.
Ammonia - Further Reading
www.troublefreepool.com
They leave Sunday morning by 10am. According to my daughter who used to have a pool and has dealt with algae in the past, she is seeing no hint of algae, slipperiness or anything except as she reports to me the water is not glistening like it usually is. Thank you all sooo much for your help.
I'll see if somehow the CYA disappeared or dropped precipitously when she does a through pool reading Sunday with me watching from Idaho lol on cell phone.If the CYA has dropped by a lot and you are getting CCs and the pH and TA are going down when you add liquid chlorine, then you probably have ammonia.
Why Does pH drop When Treating Ammonia With Liquid Chlorine?
Oxidizing ammonia creates acid by releasing hydrogen.
More than 95% of ammonia is in the form of the ammonium ion (NH4+)
4NH4+ + 3HOCl + 3OCl- --> 2N2 + 6H2O + 7H+ +6Cl-
When adding 12.5% sodium hypochlorite (liquid chlorine) to a pool to oxidize ammonia, every gallon of liquid chlorine will create the equivalent of 15 ounces of 31.45% hydrochloric acid.
10 gallons of 12.5% liquid chlorine added to 25,000 gallons of pool water with ammonia will lower the TA by about 23 ppm or the equivalent of adding 150 ounces of full strength 31.45% muriatic acid.
Every 8.53 gallons of 12.5% liquid chlorine is equivalent to about 1 gallon of 31.45% acid.
Ammonia - Further Reading
When adding 12.5% sodium hypochlorite (liquid chlorine) to a pool to oxidize ammonia, every gallon of liquid chlorine will create the equivalent of 15 ounces of 31.45% hydrochloric acid.
If it is ammonia, then every gallon of 12.5% sodium hypochlorite (liquid chlorine) will result in a 5.6 ppm drop in the TA so watch the TA carefully.
Increasing the FC by 10 ppm would result in a drop of about 4.7 ppm in the TA.
If it is ammonia, then every gallon of 12.5% sodium hypochlorite (liquid chlorine) will result in a 5.6 ppm drop in the TA so watch the TA carefully.
Increasing the FC by 10 ppm would result in a drop of about 4.7 ppm in the TA.
OK I got back to Pensacola, and was able to check my pool to see what the "so called" pool stores told my daughter to do. They supposedly gave her liquid CYA but when I got home there was no CYA in the pool at all. Bottom line I bought dry CYA took my time in its application and today have a 40 reading and chlorine and ph levels that remain like they should. I have no idea where the CYA went over the 5 months that I was traveling ... but I replenished it and all works well the way pools should.