Good to know; For the price it should be spot on.Lots of reports its very inaccurate,I saw a post this morning about it.
The range for the nitrate is 0-60, I am not surprised that you would lose accuracy outside of the range for the product. Phosphate is listed as +/- 0.2ppm, so ultra low range isn’t gonna be so helpful, but like others are saying, you will see a trend and you can catch when things are headed in the wrong direction!I actually know a guy that’s in my area that uses this I help him with his tank he spin test was reading 60 nitrates but his nitrates were actually 80 to 90