Hanna calcium checker

[Justin Swinney]

Interesting. I typically clean the culverts in tap water and then dry them with a twisted up paper towel. I wonder if enough residue is left in the culvers to cause a problem. Would be awesome if that's the case because its the only Hanna product I have ever been disappointed in.

That's the exact same thing I was doing

 

[Centerline]

That's the exact same thing I was doing

Ok then!

 

[jim 2720]

In my opinion, this is the biggest issue with the Hanna Calcium checker. A ±6% reading at 420 ppm means the checker will read anywhere from 395 ppm to 445 ppm.

Wow +_6% that is extremely inaccurate.