I transferred my fish to a new tank and so far have no ammonia or nitrites. I used the existing media and transferred half the water from old tank. I have a weird feeling I have ammonia present and added prime about 24 hours ago last time. I do have some test strips and if I remember right they test different than the drops. I've done the ammonia alert and the fish either suck on it or it gets messed up in the rdf. I want to feed the fish some but not if I have ammonia present.