Over the last few days, and then confirmed this morning, our swimming pool has turned green.
We don’t know why. Cath did some Googling but then we headed for the fount of all piscine knowledge Cash Piscine – armed with, as usual, a jam jar full of water from the pool.
After testing the water and showing the man some photos like this he asked some questions.
How many hours a day do you run the pump?
About nine?
Apparently you are meant to divide the temperature of the water in half and that’s the number of hours the pump should be running.
In recent weeks that temperature has been 28 or 29 degrees. Oops!
He diagnosed un traitement choc to prompt a deep clean of the system – and we have to leave the pump running for 24 hours.
Armed with this:
We got straight to it.
There is now a lot of scum on the surface and maybe the pool looks a little less green?
Thrown to (the) Lyon 