I have been doing water changes every day (about 25%) and keeping a close eye on ammonia and nitrites. The ammonia was pretty high about a week ago, between .5 and 1, now it is between 0 and .25, but its just staying there, not falling down to 0. Also now the nitrites are off the chart. Am i doing something wrong? Is this just the second part of the cycle, where nitrites spike? And if so shouldn't ammonia be at 0?