I am using the dichlor then bleach method. I had to top off my water because the water level got a little low. I shocked to 10 ppm FC after adding the additional water. I rechecked all my levels, but forgot about CYA. When I tested it was below 30, but still had some CYA since the testing water was cloudy. I think I am still okay?? I will add a little dichlor next time to raise CYA to 30. Also, does anyone add additional borates after topping off the water?