ok. so things are ok so far. pool looks a little less green i think. i backwashed this am and a lot of green came out so thats good. levels are still holding. ph is at 7.2 and i dont want it to drop so how much borax would i add to increase it if needed? I might just leave the cya alone for this season since only about a month or so left. once i get the pool blue and cleared up, do i still need to maintain a fc at 15-20? if so, is that safe for people to swim in? thanks