I just bought three white clouds last night and am doing a fish in cycle with some mature gravel in my 10 gallon. They seemed just peachy and even started mating behaviors this morning. A few minutes ago, though, all three grouped at the bottom and are sort of hovering while rapidly moving their fins. They are very close to the bottom but they can all swim and eat just fine. They do this for a few minutes, stop, then come back again a few minutes later. Usually the male is in front with the two females behind him. Is this normal? Are they just riding the current from the filter? Are they courting? What's up here?