I've got two black/brown kuhli loaches currently and a hillstream loach named Kite. Kite doesn't do much, mostly hides, but gets more active in the evening, which is when the rabbits do (the kuhli loaches). Check this
(with horrible water quality) and this
taken just a few moments ago. Watch your volume. The rabbits do this all the time in the evening. Kite's a little more shy. Kuhli loaches are supposed to be shy
and not social if there's only a couple of them... Uhno. They're perfectly happy to try and wriggle through Honey, race alongside the glass, all sorts. They particularly adore getting right up and personal with the heater. For about ten or so minutes now the bigger of the two has been racing alongside the glass like in that second video.