Title pretty much says it all. When measuring KH with an API test kit, does the first drop (the one that initially turns the water blue) count towards your total dKh?
Ex. I put 13 total drops into the test tube before the water changes from blue to yellow. Is my dKh 12 or 13?
Apologies if this is the wrong place to post this question.
Ex. I put 13 total drops into the test tube before the water changes from blue to yellow. Is my dKh 12 or 13?
Apologies if this is the wrong place to post this question.


