Im using a hanna alk meter. I have the hanna calcium checker but never could get results that were consistant. I was using elos for my mag and calcium. Hopefully i will find a store in edmonton with the kits tomorrow. My last trip in i couldnt find any and my last order they were omited as out of stock.
I just did a group of tests
Sg 1.024
No3 10
Alk 208
Po4 1.56
Ca (hanna) 506, 454, 518
If the hanna is correct around 500 range then ca is a bit high.
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