I started my fishless cycle on 8/11 on my 55 gallon. I accidentaly added too much ammonia to 8ppm so did some water changes to get it to 4ppm. The ammonia hasn't gone down much. It is down to about 1ppm now,PH is 7.6,Nitrite is off the chart,I have some nitrates. I had also used media from another tank and Tetra Cycle. So now that the Nitrite is so high I am assuming I need to do a water change.