Check your test instructions again, make sure you are using the right reagents. Chlorine test (FC) isn't supposed to turn from red to blue, it is supposed to become clear, you count the number of drops it takes to make the sample clear and divide by two if you are using a 10ml sample (which you should be) Calcium test doesn't turn cloudy either, all the tests are color change tests except the CYA test which does turn cloudy but it is difficult to tell if it is cloudy without using the vial with the black dot in the bottom in bright sunlight with your back to the sun and looking down into the vial with it held at arms length.