... aquarium's happy life stars from here. NH3/NH4 test Nitrates come from dissolved protein, such as fish's ... excreta, residual food, anddead fish.The compound of nitrogen exists in forms ... .NH3/NH4 test kitContents:1x2g test reagent, 1x22ml test reagent, 1x22ml test reagent,1x22ml test reagent,Test vial Color scale Instructions & Recommendations NH3/NH4 test kit