gwand72 189
Fish Aficionado
Fish of the Month 🌟
2x Tank of the Month!
Supporting Member ⭐
2x Pet of the Month!
I find the API nitrate test tube color results difficult to match up to their color chart often. The Nyos color chart has gradations of yellow merging to orange. For my eyes this is much easier to read. Plus they have a nice set up. The top test tube contains 5 mL of just tank water. No reagents. The bottom tube has the tank water and reagents.
