I recently got a school of 24 pristellas for my 150g tank. The first few
days they were looking great, swimming in formation, but since 2-3 days
they act like they are not feeling well. My water parameters are okay,
and this is a heavily planted tank. Some of them stay hidden under the
shade of plants, so my guess was that they do not appreciate the
intensity of the lighting (3 WPG
). My lights are on timers and switch on &
off gradually, just before the last one goes out, they come of of hiding.
The others just stay together in one corner of the tank.
When feeding time comes, though, they give quite a show, they like a
bunch of piranhas...
I'm a little surprised since pristellas are known to be fairly hardy, while I
have schools of neons & rummys which are doing fine... Could it be just
because of the light? I play around a lot in the tank, pruning &
re-arranging plants, maybe this is what stresses them out?