hi all, please have a look at the link showing the bottom of my pool. My pool water is balanced, new filter with new sand. I'm not sure what this is, it feels a little grainy when i touch it, it disappears if i spread it. Vacuuming it doesn't help for long. I don't think it's algae, i've super chlorinated the pool thinking it was, comes back.
http://tinypic.com/r/eti5n9/8
thankyou.
http://tinypic.com/r/eti5n9/8
thankyou.