Finally a clear pool!
I'm unable to edit my original post here https://www.reddit.com/r/swimmingpools/comments/1cwsg6m/how_do_i_vaccum_this_potentially_dead_algae_or/
But finally I was able to vacuum out the massive white deposit at the bottom of my pool and after a long struggle I finally have a clear pool at start of the season. Last year I constantly battled a green pool which I could never get under control. Thanks a lot everyone for your inputs. Below are before and after pictures.
Pool with huge deposit of \"White Powder\" at opening of the pool
