I received it on Monday but have been afraid to say I cant figure out how to use it. I started with the Chlorine and I add the red reagent but I keep adding drops to try and make it clear, I quit when I hit 11 because I don't want to have to buy this thing right away again and perhaps I am doing something wrong. I wish I could tell you exactly what the reagent and test is, but Im working and kit is at home. I just started on the first test and that's as far as I got. Any help for someone who failed science but loves swimming.