Trouble reading KH
I tested my KH for the first time last night and the results were inconclusive.
I use a Res Sea test kit, there is a start color and end color and I count the number of drops of KH indicator. Problem is it never gets to the end color, which is orange-ish with a hint of pink. It does get dark yellow. But I see people on the boards mentioning their KH with accuraccy to the tenths e.g 6.7. What should I use to test my KH that will give me that kind of accuracy.