The FC is getting used up killing algae and oxidizing your CC- at your CYA level, need to maintain about 3-6ppm FC, so keep adding bleach to get it up there. with the water still cloudy I'd go to shock levels- I think 15 for CYA 30, and maintain til <1 loss FC overnight, and <.5 CC- then let FC lower to the 3-6 range for maintainance...