All of my #s were consistent with readings of 0 for ammonia & nitrites and nitrates at 10 after 2 50% water changes. PH was at 7.6 as well consistently so on Friday I added 3 corys (2 albino, 1 peppered), 4 zebra danios, 3 platys, a male fancy tail guppy & 2 apple snails. Everyone was doing...