The HI706 Checker®HC (Handheld Colorimeter) provides a simple, accurate and cost effective way to measure phosphorus. Get simple results with easy one-button operation!!!
I have Phosphate checker HI 713. This colorometer takes out all this guess work as to what the exact reading is. It is important to know that it is .15ppm versus comparing colors of some other test kit(is it .2 or ??) In addition I like it when can read levels are .0xx with Hanna's digital read out. Really clearly read and No guessing needed.
These are great. Have seen a demo on them at a reef store and I do want them. I have put them on my Birthday, Christmas, Father's day, and anniversary want lists.