Colorimeter Options

[LRomero]

Being a person with colorblindness, I have difficulty comparing liquid color to chart color. Most of the time I'm "guessing" and that drives me crazy. That said, I've come across the Hannah Checker from a previous post and have since found some others on the market. What is a good one that is most user friendly and most economical to use being there are consumables involved with any of them?

 

[hkgar]

I use the checkers for Alk and Phosphate (the 736 for phosphorus). I don't like the calcium, but it may have been improved since I first tried it.

Tere are reagents that need to be bought periodically.

 

[Dr RBG]

I also like the Hanna Checkers