The API AMMONIA TEST KIT measures ammonia to help prevent fish loss, as ammonia is the number one stressor and killer of tropical fish. Ammonia is released into an aquarium in the forms of uneaten food, decaying organic matter, and when fish release it through their gills, urine, and solid waste. The API AMMONIA TEST KIT is a mercury-free, salicylate test for fresh and saltwater fish, and measures ammonia levels from 0 to 8 ppm. Contains 130 tests and includes 2 test solutions, easy-to-ready instructions, glass test tube and 2 color charts Is it correct for the #2 bottle in the API AMMONIA TEST KIT to have a slightly bigger hole in the spout than the #1 does? Im concerned my test kit isnt accurate because of this. The dropper tips are all the same, but the viscosity of the liquids are different. Drops may appear to be larger coming out due to the thickness of the drop. Directions Please click the Link: https://apifishcare.com/pdfs/products-us/ammonia-test-kit/api-ammonia-test-kit-instruction-manual.pdf