Can anyone help identify what this is & how I get rid of it? It is a reddish-brown color & turns powdery when I vacuum it or scrub it. It is a new saltwater pool & has only been open for 2 weeks 
We had a huge storm last week & it took me 3 days to get it clear again. I vacuumed it to waste yesterday, backwashed filter, ran pump overnight, tested chemicals, pool is balanced & now this is all over the floor of the pool again 
SO frustrating.
We had a huge storm last week & it took me 3 days to get it clear again. I vacuumed it to waste yesterday, backwashed filter, ran pump overnight, tested chemicals, pool is balanced & now this is all over the floor of the pool again SO frustrating.