It depends on how you consider an aquarium cycled. If it's just a matter of an aquarium being able to process any amount of ammonia and nitrite, you're good. If it's the more traditional 2ppm ammonia per day consumed, then you just have to dose 2ppm and see if it goes to 0 within 24 hours.So I should just do a large water change to get rid of those high nitrates and I’ll be good to go?