is it just me or is Hanna's Calcium Checker no bueno? My experience with it (3-4 tests) has been sub par, I don't think I'll use it any more. What a waste.
I'll buy it from ya if you would like to get rid of it. To be fair, there is aproblem with the syringes that came with the kit's, I believe hanna has announced that. Also you must use ro/di water with zero tds and the ro/di water can't have a high ca content or that can also affect the reading's.
I think it's ridiculous how the checker uses .1ml of sample. By using such a small sample they are introducing a propensity of high user error into the equation.