We started our conversion this past SUN and as of this morning the water is so clear, it makes my eyes hurt (still has that faint yellow tint to it, but that is clearing as well)! We were very vigilant in keeping the FC up to 15 during the whole day and it really does make the process go quickly. There was no damage to our liner whatsoever. Last night was the first night that our FC did not drop by more than 1 so it's sooooo close, we can taste it.