I've been using the Hanna ULR Phosphate checker for a while now. I had a couple questions:
1) It is almost impossible to get all the dust from a packet into the vial. Does the amount of dust affect the measurement? Or as long as I get enough in, will the reading be the same?
2) It comes with 2 vials. If I mix a packet into 1 vial and fat finger the meter, I fill the 2nd vial and zero the meter as if I were testing it, but then test the first vial, so I don't waste a packet. Any idea how accurate this is?
1) It is almost impossible to get all the dust from a packet into the vial. Does the amount of dust affect the measurement? Or as long as I get enough in, will the reading be the same?
2) It comes with 2 vials. If I mix a packet into 1 vial and fat finger the meter, I fill the 2nd vial and zero the meter as if I were testing it, but then test the first vial, so I don't waste a packet. Any idea how accurate this is?