i have 185gal tank runing on a fluval fx5 at 85 degrees witha 36inch air stone. ive added ammonia and after a little more then a a week i got my ammonia spike. ive waited 3 days and have not gotten a nitrite spike at all now my ammonia is 0 - nitrite is 0 and nitrate is 0..... so im kinda confused. there are no fish or gravel in the tank. I havnt done any water changes i have bio max peat and carbon as for my media. so whats going on?