Decided to test my tap water for ammonia today to see if possible frustration for slow cycling and my two deceased fish. Tap water was a big zero on ammonia. A definite, no question bright solid yellow. So that's good and thought I might as well test the tank again while the kit is out- another big fat zero and bright no questions yellow! I was so happy and shocked that I thought as busy as I was all morning that I must have confused the test tubes. So I repeated the tank and ammonia is zero, nitrates hard to read but looks like 5.0 Finally. Of course now I worry about adding more fish and what they call "mini-cycles". Any advice?, I have only 4 neon tetras, and one agassizi cory cat.