I started my 55g on 1/23/2012, but added way too many fish, mollies mostly (13 fish)....used Cycling by Nutfin? don't if it helped, but now my parameter read: amo .25.ppm (not too high), Nitrite 0 (been that way since started), and Nitrate 10ppm. Why is my Nitrite at 0ppm, I thought I had to...