Comments for Can't Get Chlorine Levels Down In Pool..High Chlorine

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Jun 02, 2016
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My Chlorine Is Too High and Won't Come Down
by: Anonymous

3 gal of shock added 5 days ago but haven't started using tabs yet because chlorine tests too high still. The CYA seems okay. Water is crystal clear and no chlorine smell. Unground pool is 20x40 and 30k gal. Hardness=250; Total CL=10; Free CL=10; pH=6.5; Total Alkalinity=40; Stabilizer=75. How many more sunny days could it take to lower CL? Could it be "locked"? I want to replace some water but people tell me to give it time and it will come down naturally. Do I wait 1 week? 2 weeks? Longer?




FC will come down on its own. Some reasons for the high FC are not doing the tests correctly, not using the right kit, reagents are old. Your CYA is a bit high. The range is 30 - 50ppm so for that I'd encourage you to do a partial drain and refill. Once the CYA is in the pool the only way to reduce it is by dilution. This will not only reduce the CYA to the right level but also reduce the FC.

The FC is very active right now because it's in line with the higher CYA. Your pH is too low at 6.5. The normal range is 7.2 - 7.8. You can use 20 Mule Team Borax or Arm & Hammer WASHING Soda to increase it.

Only use liquid chlorine for weekly maintenance. Once the CYA is in range it will be easy to balance the other chemicals.

You can also find much more information on this issue through my eBooks:

Clear Blue Pool eBook
Clear Up A Green Pool eBook
Resources
Swimming Pool Consultation

Robert

Sep 04, 2015
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High Chlorine Reading
by: Judy

I have a 1000 gallon pool for grand kids with a filter but it shows 10 on my test strip. How do I lower the chlorine so they can swim.




Hi Judy. There are a few basic ways to reduce the chlorine. First is to allow it to come down naturally, but this takes the longest. Next is by dilution. You can drain some water then refill with fresh. And last is the chemical Thiosulfate. I only recommend this for extreme circumstances. Over-use can change the other readings.

If you feel your situation is more complex than an email, I do phone and/or SKYPE consultations. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have no chemicals to sell you so you know I'm not bias. If you purchase a personal phone consult you'll get all 3 eBooks for free.

Pool Consultation

Clear Blue Pool eBook

How To Clear Up A Green Pool eBook

Swimming Pool Resources

Robert

Jul 17, 2015
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I Think I Over Did It
by: Kim

I think I definitely did something wrong. I think my impatience self has screwed up something. We had not used our pool in about 2 1/2 weeks, nor did we cover it up and it seems like everyday or at least sometime at night, we would get some rain and/or heavy down pours. I decided that I wanted to clean the pool and put it to use again....I have a 15 x 48 above ground Intex Pool. 4400 gallons of water.

In my haste to try and get the pool water that had turn a lovely shade of dark green clear again,
I actually put 3 1pound bags of shock, I changed the filter and I used a 1 quart bottle of Algae cleaner in my pool....I woke up the next morning to find my water is no longer green but now the water itself is Gray and you can't see the bottom of the pool (the inside is blue and white)....When I checked the water with the test strip, it show that my chlorine levels were High High, my alkalinity levels were HIGH HIGH and I think I may have definitely done something wrong...How do I get everything to go down?




Thanks for the question Kim. I need to have your complete chemical readings, the actual numbers:

Chlorine, CYA (cyanuric acid/stabilizer), pH, Alkalinity, Calcium Hardness, and Metals (iron and copper) and names of any algaecides you may have used along with clarifiers, phosphate removers, and/or flocs. It makes troubleshooting much easier and the process of clearing up your pool will go much faster. Green water is a symptom of the problem, not the problem itself. I also need the kind of filter you have and if it's working properly. If it's not working it must be fixed in order to clear up the pool.

If you feel your situation is more complex than this, I do phone and/or SKYPE consultations. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias. If you purchase a personal phone consult you'll get all 3 eBooks for free.

Pool Consultation

Clear Blue Pool eBook

How To Clear Up A Green Pool eBook

Swimming Pool Resources

Robert

May 27, 2015
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High Chlorine Upon Opening
by: Anonymous

I just opened my pool, used chlorine tabs in the floater and put it in the pool. When I tested the next day, my chlorine levels are very high. I immediately took the tabs out. That was 3 days ago. Chlorine is still really high. PH is fine, alkalinity is fine, hardness is fine. It's just chlorine.




Thanks for the question

First I'd like to have all of your readings, the actual numbers - Chlorine, CYA (cyanuric acid/stabilizer), pH, Alkalinity, Calcium Hardness, and Metals (iron and copper) and names of any algaecides you may have used along with clarifiers, phosphate removers, and/or flocs. It makes troubleshooting much easier. Unfortunately readings such as "fine" don't seem to help.

What kind of test kit are you using.? Strips? Yellow kit? Those are alright but the best one is the Taylor K-2006 kit. You can get a false high FC readings by using Potassium Monopersulfate shock. Chlorine will ALWAYS come down. It simply cannot go up without some outside influence such as adding more chlorine, whether liquid, granular, or tabs.

Get back to me with the readings and we'll go from there.

Robert

Jan 18, 2015
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Chlorine In Drinking Tap Water
by: Wendy Bubbles

We recently drained our fiberglass pool 1/2 way down then re-filled, the next day we drained it again 1/2 and refilled. So basicaly it would be like pretty fresh water.

The chlorine level is a max and starts to turn that dark on the first drop. We did this 2 weeks ago and have not added any chlorine, but did the soda to bring the PH level up.

The local pool store checked the water and everything is fine except for the chlorine. We live in the desert and have full sun almost all day long. I really don't want to add another chemical, will it eventually burn off?

It is horrible to think that our drinking water is that loaded with chlorine, scary.




Robert

Thanks for the comment Wendy. And your local water company thanks the chlorine companies even more.

Jan 10, 2015
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HIGH CHLORINE FALSE TEST RESULTS
by: Anonymous

I BELIEVE MY HIGH FC LEVELS ARE DUE TO OXY-BRITE A NON-CHLORINE OXIDIZER, AS A RESULT MY FAS/DPD CHLORINE TEST IS A FALSE HIGH DETERMINATION. I AM GOING TO USE THE TAYLOR K-1004 TEST KIT, NOT THE TF-100 KIT. HAS ANYONE OUT THERE HAD THE SAME RESULTS?




Thanks for the question

I believe what you're using is Potassium Monopersulfate shock according to the MSDS for the product you mentioned. This is a non-chlorine shock/oxidizer but not a sanitizer. You'd use liquid chlorine for both and it does a great job.

PM can be used but it is a bit more expensive and as stated only oxidizes the water while chlorine oxidizes and sanitizes.

My advice would be to stop using it and simply use good liquid chlorine to shock.

Robert

Jan 08, 2015
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false high free chlorine levels due to mps
by: pdomson

taylor k-1004 snd 2 different strip tests read a free
chlorine level of 3ppm. colorametrically. tf-100
titratible test reads 9ppm. who am i to believe?

Aug 25, 2012
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High Chlorine Level
by: Anonymous

My pool chlorine level is high at 6.89. If I add water to it will it bring the chlorine level down?




Thanks for the question. Yes, the best way to bring the chloirne level down is through a partial drain and refill. The big thing is to not allow the chlorine to get that high. Chlorine cannot go up on its own. Another way is to naturally allow it to decrease through the sun and heat, removing all of the chlorine tabs.

The fastest way is to use Thiosulfate, however, I don't recommend this. Only in extreme circumstances will you want to use this. It's expensive and you need to be right on the mark or the chlorine will drop too much. It can also skew your other readings if you use too much of it.

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