Split from Is this algae numbers don't seem to support there being any?
I'm new to the TFP community. I am in the 3rd yr of above ground pool ownership. (We never had problems the 1st two yrs) I, too, like jessosby above, keep seeing stuff in the ridges. I dove down and tried to touch it and it dissolved in my fingers... I thought it was sand but there is no grit.. nothing to hold onto.
We have been battling algae(?) off and on all summer. Whatever is happening seems to be very cyclical. The water gets cloudy for a couple days, turns greenish, we shock it, vacuum and then use clarifier. The pool becomes clear again for about a week only to repeat all over again.