Tank cycling: small ammonia spike, then... nothing?
I started cycling a tank at the beginning of the week (my first tank in years and first ever planted), and seem to have hit a bit of confusion with my ammonia readings. I added in some juvenile mosquitofish from the backyard pond as an ammonia source, and was getting very low readings for a few days, peaking at somewhere around .30 ppm, with zero nitrates and nitrites.
Yesterday, though, the measured ammonia levels dropped to zero, and read as zero today as well. Nitrite levels tested zero both days... and nitrates as well.
Plant-wise, the tank currently has a six small java ferns, a tiny windelov, one Hygrophila corymbosa 'siamensis,' and a few stems each of rotala rotundifolia arcuata and ludwigia repens. Is it possible the plants have been processing the ammonia as a nitrogen source rather than the bacteria colonies establishing themselves, hence why there was no noticeable nitrite spike and only a very small ammonia spike? Would it be safe for me to relocate the cycling fish and add in the tank's first set of permanent residents, a small school of otocinclus? I'm kind of at a loss here.