Relatively new pool owner here. Full disclosure: I am maintaining the pool myself and do not have a full handle on stable chemistry yet. Having said that, apart from a bit of algae in the summer I have not had too many problems....until now.
A few months ago I started to notice these rust-colored stains appearing at the bottom of the pool. For the most part they are in clusters which makes me think it might be some sort of fungus or algae. They do not scrub off.
The elongated stains in the clusters are about an inch long each.
Apart from the clusters there are also some small, isolated circular stains appearing of similar rusty color.
We do occasionally get bird droppings and wind-blown plant debris but not too much, and certainly nothing that is new over the past couple of months.
So first question is what is causing the stains, and then what can I do to (a) get rid of them and (b) stop them happening again?
A few months ago I started to notice these rust-colored stains appearing at the bottom of the pool. For the most part they are in clusters which makes me think it might be some sort of fungus or algae. They do not scrub off.
The elongated stains in the clusters are about an inch long each.
Apart from the clusters there are also some small, isolated circular stains appearing of similar rusty color.
We do occasionally get bird droppings and wind-blown plant debris but not too much, and certainly nothing that is new over the past couple of months.
So first question is what is causing the stains, and then what can I do to (a) get rid of them and (b) stop them happening again?