I used 3 lbs rock and 2 fish to cycle my tank almost 4 weeks ago. My ammonia and nitrites were at 0 with nitrate at 10-15 until i added 15 lbs of live rock yesterday. But today I'm getting a major spike in ammonia. Is it possible that the original rock and fish weren't enough of a load to cycle the tank? Also if it is cycling now, is it ok to make a water change to keep the fish healthy?
Thanks,
Matt
Thanks,
Matt