b4tn
Aquarium Advice Regular
But I am having a real hard time with telling the colors apart with my test kits. I have tried tetra test, JBL, and now I have seachem. The colors are just to hard for me to tell apart. I need to get fairly accurate results for nitrate and phosphate. With my seachem nitrate kit I have a hard time telling the difference between 10 and 30 ppm there has to be a better way!