Cloudy water

A BBB guide to supermarket poolcare.
Use store-bought bleach, baking soda
and borax to replace proprietary pool chemicals.
Ark2015
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Cloudy water

Postby Ark2015 » Mon 22 Jun, 2020 14:27

I’m struggling this season to get water cleared up. Hopefully, someone can look at my test numbers and see my problem and make recommendations. Free chlorine has been running high but has been gradually coming down. Today, I vacuumed thoroughly and tested levels. Numbers are: Free Chlorine-6.5, CC-looks like .5, PH-7.2, Cya-100, Alkalinity-70, Calcium Hardness-40.


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Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1701
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: Cloudy water

Postby Denniswiseman » Tue 23 Jun, 2020 02:07

With a CYA of 100 you should target a FC of 11-13
You need to dump half and refill to get to 50 and then use unstabilised chlorine
Excessive CYA renders your chlorine ineffective and you have to use more to get the same sanitation
For every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm.
For every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm.
For every 10 ppm FC added by Cal-Hypo, it also increases Calcium Hardness (CH) by at least 7 ppm
Use these common products to balance your pool
Liquid chlorine (sodium hypochlorite or plain bleach)
Muriatic acid (hydrochloric acid) to lower pH and TA
Bicarbonate of soda to raise TA
Aeration will raise pH only
Soda ash will raise pH and TA
Chlorine / CYA Chart and
Recommended Pool Levels
Ark2015
I'm new here
I'm new here
Posts: 2
Joined: Mon 22 Jun, 2020 14:19

Re: Cloudy water

Postby Ark2015 » Tue 23 Jun, 2020 11:14

Thank you! I’ll drain half the water and refill. Is the water cloudy because of the high CYA?
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1701
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: Cloudy water

Postby Denniswiseman » Wed 24 Jun, 2020 01:32

You probably had an algae bloom and the high CYA didn't let your FC do it's job properly
When you get it down to about 50 use liquid chlorine (sodium hypochlorite or plain bleach). The only thing that puts in your water is salt
Also read Slam (Shock Level and Maintain)

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