it is a hanna(is that bad?)- i calaberated it useing a freinds. but it has been a while so i will double check it. I do live in the middle of no where so maybe we have dirtier water?

It seems to work well. I add PH down and the PH goes down so it works but maybe its off ill look into that i guess.

What about Fiji water just wondering.(at least untill i can get calmag next week or permanantly?)..i happened to drink some today and the specs on the back say

typical analysis in mg/liter
Silica- 85
calcium- 17
Magnesium- 13
PH-7.5
Bicarbonattes-140
Total dissolced solids- 210