hanna nitrate checker

So as the title says I did about a 20% (5 gallons) water change last Sunday and tested nitrates on Monday. They came out around 13.9ppm which was very surprising because that was slightly higher than they were before the water change. I left it at that for a few days and tested again and came...

Hello Everyone I have the following list of equipment for sale we just moved from NY to Naples Florida just broke everything down . I bought everything brand new except the Kamora x4 from BRS saltwatertank.com and Coralvue . I have the receipts if need be. everything is in its original box...

Hanna Checkers for Sale - Like New Condition. Alkalinity, ULR Phosphorous, and Nitrate. All three work perfectly.

HI781 Saltwater Nitrate Low Range Checker - Hanna Instruments Used once Fast shipping

Hi guys, hope you’re all well. I bought a hanna check nitrate low range and just did my first test on it. I didn’t know about the high range lol. I used the dilution method to get a higher range. When I added the powder the vial was completely full to the brim! Is this correct or does it...

I have both Hanna & API test kits. Nitrate for API is 10 ppm Hanna low range checker is 2.38. Are these good readings?