You only need enough powder to turn the water pink. More won't hurt but is wasted. 46 drops are .2 per drop. Every 5 is 1ppm, so you have 9.2ppm of FC. If 5 drops of #3 leave the water clear and it doesn't have even a hint of pink, you have no measureable CC. If it's clearly pink you add drops till it goes clear. If you aren't sure, sit the tube on a white surface and see if it has a pink tinge. If you think it does and add 1 drop of #2. If it doesn't change at all, try another until it changes, or until you are sure it won't (3 drops at most). If it changes, each drop is .2 ppm of CC.Originally Posted by DMand
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