I've been a di-chlor/tri-chlor user for 4 years; ready to switch over to BBB. My CYA is 120; my FC is 0. Everything else normal. Soon I will empty 2/3 of the water to get the CYA down, but in the meantine, I want to get the FC up. Water is clear, but I'm seeing some traces of algae. The caculator tells me I need to add 2730 oz of 6% bleach to get my shock FC up to 46.7. I know that's a lot, and I trust the math, but just want to have someone else tell me it sounds right. Also, what's best way to add it? Near a skimmer, or near a feed line? How slow do I need to be putting that much in?