Re: cycling tank-am I done?? (should I add a fish?)
As flynngriff said, I doubt that your tank is cycled and I don't see where the bulb would indicate that nitrates are present. The ammonia that you described sounds like the right stuff. So you have no fish in the tank now, right? Add enough of your ammonia to get a reading of about 3ppm. Tomorrow, test for ammonia again. If the ammonia is gone, you are cycled. If not, you are not cycled. Simple as that.
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