So initially this was a new fill, so I started maintaining it with trichlor tabs. Everything was fine at first. Water all clear. Then, when I saw CYA reached the needed levels of 40-45, I switched to cal hypo to avoid going into CYA runaway. Pretty much the next day after application, the water turned cloudy, and has only gotten worse. I always maintain FC between 3.5->9.0, testing twice a week. What do I do to fix it?