Green murky water

Causes and cures for cloudy swimming pool water.
Milky pool water, white, pink, brown, purple, black cloudy water.
Jphannon
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My Pool: Above ground steel frame, 12ft by 48” 500 gallon sand filter, on grass, floor slightly sloped

Re: Green murky water

Postby Jphannon » Sat 18 Aug, 2018 03:47

So I just need a stabilised chlorine tester,
Would this one do https://www.ukpoolstore.co.uk/acatalog/ ... t_Kit.html


Denniswiseman
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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: Green murky water

Postby Denniswiseman » Sat 18 Aug, 2018 04:11

No the chlorine is only measured up to 6 and it doesn't test CYA
Why don't you bite the bullet and import from the states or drain and refill
Jphannon
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Posts: 23
Joined: Fri 17 Aug, 2018 01:22
My Pool: Above ground steel frame, 12ft by 48” 500 gallon sand filter, on grass, floor slightly sloped

Re: Green murky water

Postby Jphannon » Sat 18 Aug, 2018 04:39

Just found one that tests cya but does it go past 6?
https://www.ukpoolstore.co.uk/acatalog/ ... t-kit.html
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1289
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: Green murky water

Postby Denniswiseman » Sat 18 Aug, 2018 04:53

That would give you a rough idea of your levels for a start and the chlorine goes up to 10
The only way to reduce your CYA is to drain and refill (if your CYA is 200, drain half and refill it would then be 100)
If you get it down to 50 your shock level would still be 20 which you can't measure, that is why i'm saying to drain and refill might be the best option
Jphannon
Pool Enthusiast
Pool Enthusiast
Posts: 23
Joined: Fri 17 Aug, 2018 01:22
My Pool: Above ground steel frame, 12ft by 48” 500 gallon sand filter, on grass, floor slightly sloped

Re: Green murky water

Postby Jphannon » Sat 18 Aug, 2018 05:34

So what level cya would I have to get it to, do I can use the shock?
Jphannon
Pool Enthusiast
Pool Enthusiast
Posts: 23
Joined: Fri 17 Aug, 2018 01:22
My Pool: Above ground steel frame, 12ft by 48” 500 gallon sand filter, on grass, floor slightly sloped

Re: Green murky water

Postby Jphannon » Sat 18 Aug, 2018 05:35

So I not do I
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1289
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: Green murky water

Postby Denniswiseman » Sat 18 Aug, 2018 06:35

Looking at the Chlorine / CYA Chart I would suggest 30 because the shock level would be 12 which is slightly over the 10 on the test strips
Bear in mind that stablised chlorine contains CYA, so if you are using that you will be raising your CYA and will have to increase your chlorine level
First of all I would recommend getting the test strips and testing the water if it is over 300 take a sample and add an equal amount of tap water, retest and double the result to get your actual CYA
Then decide whether it's worth trying to save some water
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1289
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: Green murky water

Postby Denniswiseman » Sat 18 Aug, 2018 06:36

I would get a few packs of those strips as you will be doing a lot of testing
Teapot
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Joined: Tue 17 Oct, 2017 10:52
My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
Location: UK

Re: Green murky water

Postby Teapot » Sat 18 Aug, 2018 06:45

You cannot test CYA with strips, I have tested pools at 180 and 200 ppm CYA, owners strips showed 50 and 30!
I can supply testers much better than UK poolstore.
Teapot
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Joined: Tue 17 Oct, 2017 10:52
My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
Location: UK

Re: Green murky water

Postby Teapot » Sat 18 Aug, 2018 06:47

Strips are rubbish.
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1289
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: Green murky water

Postby Denniswiseman » Sat 18 Aug, 2018 06:56

Teapot wrote:Strips are rubbish.

Yes I agree with you but we seem to have a problem convincing Jphannon to do the job properly or drain down
Jphannon
Pool Enthusiast
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Posts: 23
Joined: Fri 17 Aug, 2018 01:22
My Pool: Above ground steel frame, 12ft by 48” 500 gallon sand filter, on grass, floor slightly sloped

Re: Green murky water

Postby Jphannon » Sat 18 Aug, 2018 07:12

There is no point draining and refilling as it will be going away soon for the winter in about 2 or 3 weeks and costs £70($90) each time to fill it, also the test kit you recommended costs more than the pool and the pump it’s self. I was just looking for a quick fix, thinking it would just need more chlorine
Jphannon
Pool Enthusiast
Pool Enthusiast
Posts: 23
Joined: Fri 17 Aug, 2018 01:22
My Pool: Above ground steel frame, 12ft by 48” 500 gallon sand filter, on grass, floor slightly sloped

Re: Green murky water

Postby Jphannon » Sat 18 Aug, 2018 07:15

Also a quick question, would a ppm tester be good for measuring the chlorine levels the one I’m thinking about is Water Quality Test Meter Pancellent TDS PH 2 in 1 Kit 0-9990 PPM Measurement Range 1 PPM Resolution 2% Readout Accuracy https://www.amazon.co.uk/dp/B075GH8D1W/ ... EBbBYVPTGQ
Teapot
Pool Industry Leader
Pool Industry Leader
Posts: 1131
Joined: Tue 17 Oct, 2017 10:52
My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
Location: UK

Re: Green murky water

Postby Teapot » Sat 18 Aug, 2018 08:41

Denniswiseman wrote:That would give you a rough idea of your levels for a start and the chlorine goes up to 10
The only way to reduce your CYA is to drain and refill (if your CYA is 200, drain half and refill it would then be 100)
If you get it down to 50 your shock level would still be 20 which you can't measure, that is why i'm saying to drain and refill might be the best option

With a reagent test kit or even a comparitor, using a dilution sample you can measure higher levels.
I would not be suggesting a kit that cost that much, certainly not more than the pool setup.
A stand alone CYA tester is about £27 A titration test kit for chlorine, CYA, calcium hardness, Alkalinity & pH is about £90 but has less reagents than the electronic one. A chlorine 1 & 3, CYA,Calcium hardness, Alkalinity & pH electronic tester is about £150 and includes enough reagents to last you a good 3-5 years, I.E. is cheaper than the other one.
EDIT: Once you have the tester buying fresh reagents is low cost.

The unit you posted is a TDS and pH meter, I have one and it's used for measuring TDS (total dissolved solids) not much use to you.
Teapot
Pool Industry Leader
Pool Industry Leader
Posts: 1131
Joined: Tue 17 Oct, 2017 10:52
My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
Location: UK

Re: Green murky water

Postby Teapot » Sat 18 Aug, 2018 08:49

4m x 1.2m is about 15m3, how much do you pay for water, £1.25/m3 or £2.50/m3 a lot less than £70??

2 things that make pool ownership hardwork.
1. lack of understanding about CYA stabiliser.
2. Trying to use dip strips to maintain a pool.

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