ok my Ammonia's levels are at 0ppm but my nitrite is around 5ppm and i can't seem to get it lower. how long after ammonia (which came down to 0 2 days ago) is at zero does it take for the nitrIte to go down? what will help? i've been doing water changes about every 2 days. what about bying some bio-spiral to put in there or the "cycle" stuff???