Friday 5 March 2021

Pool cover makes water go hazy

Our pool has an opaque thermal foam pool cover (4mm sandwich of closed cell foam) rather than a translucent bubble cover. We keep the cover on 24 hours a day except when swimming (drought and water restrictions here).

I have found that if the pool doesn't get much use in a given week, the water gets a white haze to it. If I remove the cover for 24-48 hours then the haze goes away completely and water goes back to crystal clear. There is no change in FC or CC that I can detect.

What is...

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