I have the API liquid nitrate test kit and use it regularly.
In my goldfish tank i have high nitrates and reading the results of the test is hard, the colors are very similar and the values jump as they go higher (40-80-160) i was wondering if anyone has a better test kit that they use that would be a little easier to use!
I use the red sea test kit with pretty good results. Colors aren't too hard to tell and if you're confused, you can redo the test diluted with 5parts distilled water to help narrow down your exact number.
20g platy, , 2 x 10g shrimp, 3 x 20g shrimp, 7.5g shrimp and 1 great dane/mastiff puppy.