I am slightly confused on the results I am seeing between two different devices. I am also not sure if the nature of ARF (how its metabolized, etc) is throwing stuff off as well.
At one point, my Hydros IV and Hanna Alk checker were both reading 8.3-8.5.
My IV has drifted to 9-10, however Hanna is still reading Alk in the 8.3 range.
My Hanna meter is 2 years old and has some wear and tear. The Hydros is pretty new (couple months with a new PH Probe). To throw things off even more, Red Sea Pro Alk testing has it in the 7's
At one point, my Hydros IV and Hanna Alk checker were both reading 8.3-8.5.
My IV has drifted to 9-10, however Hanna is still reading Alk in the 8.3 range.
- I recalibrated Hydros IV PH and cleaned everything - still reading in the low 10's
- Hanna is steady at 8.3-8.5
My Hanna meter is 2 years old and has some wear and tear. The Hydros is pretty new (couple months with a new PH Probe). To throw things off even more, Red Sea Pro Alk testing has it in the 7's