If your CYA is really 200 ppm, you will need to dilute your pool water to get readable results. Carefully measure and mix 1 cup of pool water with 1 cup of tap (your drinking water will have no CYA in it) or distilled water. Double the reading you get. You may need to add 2 cups of tap/distilled water to 1 cup pool water to get a useful reading, if so, multiply the reading by 3. There are some videos on the test kit you should watch before you start testing. I don't have the links right now, but I'll find them.


Are you going to do a complete drain and refill? If you're doing a partial drain & refill, you don't need the dichlor. If your pool's pH tends to drift down, like mine, you may never need MA.

Pappy