Can anybody shed any light on this behavior:
When I got up this morning, I noticed that a couple of my serpae's had a noticeably darker than normal coloring. Almost brown rather than their normal orangy-red. They were very "twitchy", and would swim up and kind of shimmy side to side against the other serpaes in some kind of aquatic Elvis dance maneauver.

An hour or so later, they are acting normally again.
They are in a 55 gallon tank, and the only other occupants are 4 juvenile angels. The tank seems to be in a mini-cycle since the angels were added, but the levels are under control (.25 amm, 0
nitrite, 5
nitrate) and I am changing the water frequently to keep them that way until things stabilize again.
Sean