I Can't Seem To Get The Cloudiness Out Of My Pool. Both The pH And Chlorine Are High. How Do I Lower Them?

by Shelley Rose
(Niagara Falls, ON, Canada)

I have shocked it twice now with powder chlorination.

Now the chlorine level is high. The pH level was high from the start...


Thanks for the question Shelley

First, I'd like to have your actual chemical readings for the chlorine and pH. The question says "high" but that doesn't help too much.

Granular chlorine will, initially, cloud up the pool because it has calcium in it. This kind of chlorine is called Calcium Hypochlorite. It's the calcium that binds the chlorine together. And granular chlorine has a pH level of 12, so you're raising the pH each time you use it.

I would suggest using liquid chlorine. You can even use bleach. It's the same thing; sodium hypochlorite. Bleach (6%) is just a watered down version of liquid chlorine (12 - 15%).

Obviously with bleach you'll use a little more because the strength is a little less. If you shocked with Dichlor, which is another powder chlorine, your CYA (stabilizer) will increase as well.

Be careful in using this as the CYA can get out of hand quickly. For every 10ppm of Dichlor, you'll raise your CYA 9ppm. You can go here to learn how to lower your pH levels:

Swimming Pool pH Levels

Pool pH

They have the charts you need for your size pool. There's three ways to lower your chlorine:

*Allow it to come down naturally through the sun and heat

*Drain 1/3 - 1/2 of the water, refill, and balance out the chemicals again

*Use a chemical called Thiosulfate. Only use this in extreme circumstances because over-use can mess up your chlorine readings.

Normally pool owners will allow the chlorine level to come down naturally. This could take anywhere between 2 - 5 days, depending on the current chlorine level and how much sun and heat they get. You can find your post on this page:

Cloudy Pool Water

And on the Q&A page in the "Cloudy, Milky, Discolored Pool Water" category.

Swimming Pool Questions and Answers

Hope this helps and let me know how it turns out for you.

Have a great Summer.


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Jan 18, 2015
Cloudy Water With A High pH Level
by: Shelly

My pH level is 8.2 which .. How much bleach should I be putting in? And also should I be adding my regular chemicals?

Thanks for the follow up Shelley

Being that I don't have the size of your pool, it's impossible to say with any degree of certainty how much muriatic acid you should use to lower your pH level.

The above pH links have charts and pool sizes so you'll know how much acid to put in. This also holds true for your chlorine levels. You can go to these links for your chlorine levels:

Swimming Pool Chlorine

Pool Shock

Pool Chlorine

Chlorine Tablets

Pool Chlorine Tablets

They too have the charts you need for your size pool. While you get the pH and chlorine right, go ahead and make any adjustments to the alkalinity and/or calcium hardness.

If the alkalinity is in check, you can use 20 Mule Team Borax to raise your pH level without much happening to your alkalinity. This is a common item that you can find in your local grocery store. Contact me again if you have any more questions. Again, if you can give me your full chemical readings along with the size of your pool, it would help out. This way there's no guessing and you'll be on your way even faster.


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