Good machine By Ryan on 9/26/2011
Ryan would recommend this product to a friend
The tester I have had all weekend and used it several times. I hae compared it the API tests and it is correlating well. The down side is the need for reagents and you must calibrate with RODI water but otherwise a workable little unit that helps take the guess work out of it.
Flawed Design By Mulberry on 9/24/2011
Mulberry wouldn't recommend this product to a friend
As noted by others, the dilution of 0.1 ml sample is problematic. I tried it with the RODI water and distilled water (from the pharmacy) and I get readings off by about 50-100 mg/L too high. It's not usable for me. I wouldn't recommend it. The phosphate test works for me.
Too difficult to use, wait for an upgrade By jamie on 9/8/2011
jamie would recommend this product to a friend
First off, I love my pH checker from Hanna. I was hoping for the same ease of use from the calcium checker. However, it requires the use of testing water that is basically 0 ppm of Ca. Anything else and the test fails. Also, the requirement for the sample is to accurately measure 0.1 ml of your tank water and then one of the reagents is a powder. I would give Hanna more time to figure this one out before buying.
I would hold on this. By Dan on 9/4/2011
Dan would recommend this product to a friend
it requires extremely pure water (DI/distill lab grade) and accurate measuring of 0.1ml (yes one tenth ml) of your sampl tank water. If you can get both right test will work. If your DI will have slight trace of CA you'll be way off.. according to Hanna even 2ppm of CA in DI is not acceptable. I would wait for Hanna address these issues.
Easy to use and gives accurate readings By Tom on 8/24/2011
Tom would recommend this product to a friend
Easy to use and gives accurate readings. 2 things to note are:
- Requires DI water
- Reagent B is a powder
Not very happy about using a powered reagent, But other than that, I'm very happy with my purchase.