I am still struggling with water volume into the fermenter. last batch too much this time not enough... Anyway the big difference is last batch sat in the boil pot overnight as I had to go to work at the last minute. This time I cooled and tried to transfer to the fermenter but ended up with about 1.5 gallons of bottom stuff (not hops I used a spider). How long after cooling is a good wait time after cooling before transferring to the fermenter to settle out the bottom stuff?