The LR one i assume is what you have in that case? - The HR nitrate is the simplest test to do out of all including salifert. add 1 pouch of powder - wait 7 minutes.I also have the Hanna checker, purchased it 4 months ago ... it came with 25 test. I have 23 test left. Big pain in the butt of a test
I think people are still getting the LR and HR mixed up or arent aware there is two.