This Green Algae at Waterline

Algae problems in swimming pool water.
Green (cloudy) water or slimy pool walls.
Black algae. Mustard algae. Pink or white pool mold.
smcrea
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This Green Algae at Waterline

Postby smcrea » Sun 09 Oct, 2016 20:06

Hi,

My water chemistry is new perfect but I have a thick dark green algae that you can scrape with your fingernail.

I've tried shocking, scrubbing it and everything.

Can anyone please give me some advise?

Thanks

Steve


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: This Green Algae at Waterline

Postby Denniswiseman » Mon 10 Oct, 2016 01:53

Hi Steve
Your water chemistry can not be perfect for algae to bloom
Do you have a test kit to check your own numbers? Pool stores and strips are widely inaccurate
Please post the results back because your Chlorine / CYA ratio is important to determine your chlorine shock level
How do you chlorinate?
You will need to Slam, follow the instructions exactly and don't miss anything
smcrea
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Re: This Green Algae at Waterline

Postby smcrea » Mon 10 Oct, 2016 22:17

Thanks for the response! :-)

I do have my test kit which I use twice a week and adjust my water balance and sanitizer accordingly.

My Ph is good
Free Chlorine level is good
TA is good

This isn't an algae 'bloom', my water is clear and sparkling. This is a line of a thick slime like algae about 1/4 inch wide in places. It is only at the water line.

This algae is slime like and can be scraped with a fingernail. Its a dark green color.

Thanks for any advice

Steve
Denniswiseman
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Posts: 334
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: This Green Algae at Waterline

Postby Denniswiseman » Tue 11 Oct, 2016 06:55

You don't mention your CYA as this is relative to what your chlorine numbers are
Have you tried rubbing bleach on it also when shocking try raising the water level a bit to make sure the line is covered
smcrea
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Re: This Green Algae at Waterline

Postby smcrea » Tue 11 Oct, 2016 21:25

CYA is at 50ppm, so I'm retaining chlorine

I'll try raising the water line a bit. I'll have to plug the overflow and fill it a bit. Thats a great idea. Then give it a very high shock. I'm a bit worried about bleaching my stone if I rub bleach on it.
Denniswiseman
Swimming Pool Superstar
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Posts: 334
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: This Green Algae at Waterline

Postby Denniswiseman » Wed 12 Oct, 2016 02:53

Try a sample on a hidden area first, then if it works in the pool wash the surplus off
Some people rub a Trichlor puck over it
saovietxulynuoc
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Re: This Green Algae at Waterline

Postby saovietxulynuoc » Fri 11 Nov, 2016 03:23

I think if you shocked and have no good result, you should try to use insecticide algae chemical
pHin
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Re: This Green Algae at Waterline

Postby pHin » Fri 18 Nov, 2016 13:14

We recommend the combination of algaecide and shock treatments, in that order. Algaecide first, then shock for best results.

It is also important to perform regular maintenance.

Check out this blog for more information http://blog.phin.co/your-pool-went-from ... an-you-do/

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