hanna nitrate

I have the Hanna nitrate HR and it been reading all sorts of stuff. For example just tested. First time read 8.4 and second time read 32.1. Tested at the same time right after. What do I do about this?

So on one of my Facebook groups a guy mentioned he uses the API reagent in his Hanna nitrate HR checker. He was very vague and not helpful when I asked him follow up questions. Has anyone else done this with success? Getting 125 tests out of API for cheaper then 25 Hanna reagents seems like a...

Looking to buy specific Hanna checkers. Looking for a high nitrate hanna tester as well as a low phosphate. Located in Richmond area for shipping costs

I made a large water change today, and thought'd it be "fun" to compare results between the new Hanna Nitrate High Range 782, and the old Low Range 781 using the dilution step. 781 Low Range diluted 782 High Range Percentual Difference Before Water Change 24,9 33 27,9% After Water Change...

How important is the quality of ro/di water used with the calcium checker? Is ro/di water testing 0 with any TDS pen good enough, or does it need it need to be pharmaceutical grade purified water? In the dilution step of the nitrate test, does the nitrate-nitrite-free artificial sea water need...

I was on Hanna website and saw that the tester was available but meh the 5ppm limit has always been a turn off. Then I went to YouTube and found the Video below and thought great, it can do 50ppm! I put the unit in my cart and was about to finalize the order when I decided I better watch the...

Limited initial quantities. Pre-order yours today! SHOP NOW! The HI781 Nitrate Checker HC by Hanna Instruments is a simple and accurate handheld colorimeter that uses the Beer-Lambert principle to determine nitrate concentration. The HI781`s low range of 0.00 - 5.00 makes it ideal for measuring...