Jimbo662 Posted December 19, 2015 Share Posted December 19, 2015 I just tested my calcium and it was much higher than the last time i tested so I thought I'd retest...and I got a different number so I tested again and got a different number again!!! I'm using a hanna checker. Anyone else ever have this issue? I made sure I did each test the same every time. The numbers were 477, 420 and 491. I used the same ro water and the same saltwater sample. Alk was very close to last time and mag is increasing because I'm dosing. Link to comment Share on other sites More sharing options...
FarmerTy Posted December 19, 2015 Share Posted December 19, 2015 Those Hanna Calcium checkers are not consistent. That's why I never bought one Jimbo. Good thing Ca is really more of a ball-park number for the range. Link to comment Share on other sites More sharing options...
Jimbo662 Posted December 19, 2015 Author Share Posted December 19, 2015 Hmmm...and I thought there were going to be more accurate. I remembered I had a Salifert kit that hasn't expired. Just did two tests with it and came very close on both at around 390. So based on today's tests my cal / alk is a tiny bit low. 6.44. Mag is up to 1230. Link to comment Share on other sites More sharing options...
victoly Posted December 19, 2015 Share Posted December 19, 2015 2nd to ty. unless you buy a micropipetter to measure your input, it's really hard to get the liquid reagent parts of that meter correct. Salifert is the go-to for calcium. Link to comment Share on other sites More sharing options...
Jimbo662 Posted December 19, 2015 Author Share Posted December 19, 2015 Thanks Link to comment Share on other sites More sharing options...
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