Hanna checker consistency

[gmdcdvm]

Just thought I would post this. Dont know how accurate the Hanna checkers might be. But they appear consistent. My phosphates were running high. Had to get a low range since the ultra low range was always at 0.9. With the low range it was reading 2.0 at one point. Started dosing lanthanum.

Most recent results.

 

[PjFish]

@Alexander1312 report

 

[Alexander1312]

@Alexander1312 report

I do believe the Hanna testers provide good indications of where non-organic phosphate is approximately. However, this test seems to create more differences than some other tests in terms of reliability of test results. In my case, 0.11 was 0.014 as per ICP, and while it could be an ICP test error, looking at some LPS I tend to feel that this might actually be correct. There are some that blame certain hanna testing packets too. Using two different testers is probably less important than using two different testing packets lots.

 

[grizfyrfyter]

Good batteries is also crucial for consistent tests. I haven't used this model of checker yet but the others I used would have very different readings on the same sample with low batteries but consistent with fresh, quality batteries