2 days ago I Shocked with 2 #'s of shock, tested today and the FC was at about .5 I added 2 .5 qts of 6% bleach this morning, tested in the evening and the FC was still at about .5 Whjat could be eating up all my chlorine.....The pool is 17,000 gallons, ph at 7.4 and CYA was at 0 but added conditioner 1 day ago, so it should be coming up....