nitrate checker

Hi guys, I’m selling my hannah checker NITRATE ULR plus extra reagents that hasn’t been opened I’ve used my checker less than 3 times, I switched to the HR for a quicker test, I don’t really chase low nitrates lvl for my tank

I am having huge discrepancies between my brand new Hanna HR Nitrate test and my Salifert Nitrate test. Both are very consistent...but which one is accurate?? Salifert was testing around 30ppm initially for 3 tests. Hanna tested 7.8ppm a few days ago at the same time as Salifert. I bought...

Need help with Red Sea nitrates results. I’m am leaning towards 20 but it can see some 50 In it. Any thoughts? All pictures from same results

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...