J
jdragunas
Guest
when your ammonia and nitrites are at 0, you're cycle's over. Then you do a water change to get your nitrates down to > 20ppm. I'd say after that, wait about another week, do a water test, and if all levels are good, you're ready to add a fish. Remember, only add one at a time, and space additions apart at least 2-4 weeks! (otherwise, you'll shock the tank.)