Mustard algae in pool water

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Cheshire Lad
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Mustard algae in pool water

Post by Cheshire Lad » Thu Sep 22, 2022 3:58 pm

Having a problem with the pool lately.

As the chlorine level on the pool falls, as a consequence of the uv breaking down the chlorine, yellow algae emerges attaching itself to the pool wall.

I’ve used phosphate killer to remove what the algae feed on, which turns out to be only a temporary fix.

Here’s the lightbulb moment……

As a result of the pool level falling because of evaporation, I’m topping up the pool with mains water, and inadvertently ( I think) introducing more algae into the pool

My question is: Can I filer out algae with a filter at the point of entry to the house?

I appear to have a strain of algae called Mustard Algae. Hard to eradicate.

Anyone have an answer or a contact for mains water filters?

Regards
CL

Uncle D
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Re: Mustard algae in pool water

Post by Uncle D » Thu Sep 22, 2022 5:52 pm

You need to shock the pool, ie but a pool shock product in or put an excessive amount of chlorine in, do this in the evening and run the pump all night and the next day until it clears.
David

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cyprusmax47
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Re: Mustard algae in pool water

Post by cyprusmax47 » Thu Sep 22, 2022 9:00 pm

Most important is to adjust the pH of the pool as chlorine acts only with the right pH. Every time you are topping up the pool it can change the pH. Algae blooms remove carbon dioxide from the water during photosynthesis, and this process slowly but surely raises the pH of your pool. It’s worth noting that algae thrives in a high pH pool, so the problem will get exponentially worse if left untreated.

Max

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Aargent
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Re: Mustard algae in pool water

Post by Aargent » Fri Sep 23, 2022 2:54 pm

A good quality Algaecide like the one made by P S Swimline, from H2Owen will get rid of Green, Black and Mustard. be warned - use sparingly
Alastair

Nil illigitimi carborundum

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LouiseCastricum
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Re: Mustard algae in pool water

Post by LouiseCastricum » Wed Sep 28, 2022 10:26 am

Aargent wrote:
Fri Sep 23, 2022 2:54 pm
A good quality Algaecide like the one made by P S Swimline, from H2Owen will get rid of Green, Black and Mustard. be warned - use sparingly
I've send you a message.
Louise :)

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LouiseCastricum
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Re: Mustard algae in pool water

Post by LouiseCastricum » Wed Sep 28, 2022 4:07 pm

Thank you Aargent.
Louise :)

Cheshire Lad
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Re: Mustard algae in pool water

Post by Cheshire Lad » Thu Sep 29, 2022 9:25 am

Thanks everyone.
I think that we will give the h2owen product a go, and see where we get to.

However, I still think that we are .’ Importing’ algae via the pool top up system, and I’m still searching for an answer as to whether we can filter out at the point at which the water comes into the driveway

trevnhil
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Re: Mustard algae in pool water

Post by trevnhil » Thu Sep 29, 2022 9:43 am

Probably the water coming into your driveway is from a Mains pipe in the street feeding other houses.
Have you been in contact with any neighbours that have pools to see if they have the same problem, as I think they will be using the same water supply
Trev..

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