I love this Forum & first time I have had to post a topic
One of the pools I maintain has literally in 3 days developed some very stubborn stains around the floor jets, they are in fan shapes in keeping with the obvious outflow from the floor jets & are a browny colour
Also when the pool is backwashed it is a browny/red colour & needs backwashing daily.
I have shocked the pool & the water is now clear.
Can anyone help please