Hi,
I don't know...I just finished my first Hagen Ca kit a month ago. I have used it for three years now and I test about once every two-three weeks.
Let say one drop of water is 0.03ml and the third bottle has about 15 ml. So, that means there should be 500 drops of water. 0.03ml is based on my Salifert kit - it usually smaller than that, but on average it is approximately 0.03ml. With each test being 15 drops, then you would have about 33 tests.
I guess, I forgot to mention that I use half dosage - i.e. I use half as much test water sample. So, that works to about 66 tests. In some cases, I use 1/5 samples (for example, for my reactor effluent or I am really bored). I use a small graduated pipette to get an accurate 1/5 or 1/2 samples.
I haven't heard too many success stories with the Hagen test kits. So, I would avoid this test kit and pick up a Salifert.
- Victor.
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