$175? wow that seems to be quite a bit less than I remember when I was looking at these things. If this unit also measures other parameters depending on the reagent you use it's not a bad deal.

Not to go too off topic, but I'd like to know more about this organic vs inorganic NO3:

- The KNO3 we add to our tanks is inorganic right?
- So the NO3 from KNO3 is less harmful than organic NO3?
- The majority of hobbiest NO3 test kits (including LaMotte) are testing what? Organic NO3? or both?