Swimming pool question

  • Last Post 15 May 2020
Zanistibi posted this 12 December 2019

Last year my pool seemed to be permanently cloudy, even though the water quality appeared to be okay when it was tested. When I brushed the sides of the pool with my hand, I saw a white dusty residue come from the walls. Somebody told me that the paint https://greenyardmaster.com/best-pool-paint/ was breaking down and it was time to repaint the pool.

So in January I drained the pool. Got out my pressure washer and scraper and stripped all the old paint and repainted it with epoxy pool paint. The same as the original colour, white. I followed the instructions to the letter. I even painted it at night time so that I wouldn't get the paint blisters that you get with epoxy paint and the hot climate.

Eleven months later, I have exactly the same problem. The chlorine content is spot on, the ph is right. It has been flocked, brushed vacuumed, I've changed the filter sand, added pool blue. No matter what, I cannot get rid of this cloudy suspension. When I brush the sides of the walls with my hand, I get this milky residue again.

One of the conclusions I have come to is that maybe the cement is leaching through the paint. I am now considering tiling the pool, but this will be costly. The square meter-age of my pool is 101 sqm.

Does anyone have any ideas?

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Poolingdeck posted this 14 March 2020

Efflorescence is a chalky white salt residue that can occur with any product containing cement. As moisture migrates up to the surface of the concreteit carries along with its calcium salts from within the concrete. When the salts reach the surface, they react with CO2 in the air and form insoluble calcium carbonate. I think that is what is happening even after the epoxy paint.

RTamanda posted this 16 March 2020

What's your calcium hardness? The water may be pulling calcium out of your walls if it's too low in the water. Worth a quick test to see, and adding calcium to your pool is a much cheaper fix. 

epoxyfied posted this 25 April 2020

This is caused by the pool being painted & the chemicals not balanced correct, chemicals eat away at paint and when brushing walls the water can become cloudy with chalk looking clouds.


epoxyfied posted this 15 May 2020

 Concrete is responsible for some of the highest quality swimming pools ever built. maybe from the foundation the mixture can be monitored.