I have been adding Ammonia to my 10g for about 3 weeks. 2 weeks into the cycle I introduced a rock from the pet store, it had alot of green "moss" on it and apperaed to be well established. My tank is eating hrough 3ppm of ammonia overnight super fast. Except one problem. My Nitrite is at 0.50 and has been for the past 2 weeks can I do a massive water change to get my nitrates and nitrites down and then begin adding fish slowly? BTW my ebo jagar heater is on and my temp is 77*F I leave my 15w hook on 11-12 hours a day.