Quote Originally Posted by aylad View Post
If you put in 33 drops, then your chlorine is actually 16.5 (if you used the 10 mL sample). You divide by 2, instead of multiplying by 2. I would add CYA to around 40-50 ppm, but otherwise your numbers don't look too bad. If it's a concrete pool, then your calcium needs to be 200-400 ppm, but you didn't list that. If it's too low, then the water will leach the calcium out of your concrete finish and make it brittle.
thank you Aylad, my test kit said to multiply by drop equivalence (0.2 for 25 ml, and 0.5 for 10 ml), and i just realized I am a moron and 33 times .2 equals 6.6 not 66, ok so question now becomes, "how much CYA to get my pool to that 40-50 ppm area"? I have 25 lbs on hand.