As written on GBD by Eric M., Hanna Instruments will be releasing more tools to test your water parameters. The makers of the highly popular Phosphate Colorimeter, have decided that they are going to apply their technologies on testing Calcium, Alkalinity and Nitrate (something that other companies have failed to test miserably).
Here is a snip from GBD:
We’ve heard rumors brewing, and now Hanna President Martino Nardo has confirmed–Hanna Instruments is working on Alkalinity, Calcium and Magnesium Checker colorimeter models. These will join the current popular Hanna Checker Phosphate colorimeters, including their new HI736 ULR model
Rest assured that we will be one of the first in getting our hands on these units. So stay tuned for our results, good or bad!

Thanks for the (proper) backtrack Vlad!