They're not doing anything out of the ordinary. No flashing. They just seem to settle in there and hang out. One little neon tetra likes to hang out behind a rock in the corner. He always has since day 1. If they could read, he'd have a library back there. The danio's continue to zip around but the neon tetras and my dwarf gourami, I thought, should me mid/top level fish. Is it normal for them to just lurk? I did a test with the api kit and all the parameters were fine. The ammonia was a little high but just barely outside of the 0 range. Nitrites were 0. Nitrates were hovering around 5. I did a small water change to even out that ammonia. When I come to the tank all the fish greet me hoping for food, and everyone looks fine. i don't see anything to indicate sickness. And of course the kuhlie's come out in the evening and rip around through the sand. Everyone is accounted for. I understand the dwarf gourami can be shy, but maybe I need to add some more tetra to make the school a little larger? Maybe they're stressed by the darn danio's constantly ripping around? I'm under stocked so I have space for it. It's a 36 G tank.