Going to good to be true......, I added 6 blue damsels a couple of days ago and had 1 die the next day, another this morning, and one seems to be breathing pretty heavily. Ammonia, nitrite, and nitrate are at 0, ph is good, and salt level is at 1.023. Any ideas? Maybe aggresion? A yellow tail damsel was in there a day before the other 5 went in.