0.25-0.5 ammonia is not too good for the fish. As said above, test the water for the other stats beacause thats the only way we can tell that it's not due to water quality problems.
i tried testing the water stats and discovered that they had expired, and the tests gave messed up results. they didn't change color when they were supposed to.
i can't get to the store today, so what can i do?