Banggai Cardinal

I'm pretty sure you can just keep one, I've seen tank setups w/ only one.

ditto on that, but if you want to keep more than one make sure that you introduce them at the same time. Aquacultured seems to be the way to go because there is less of a chance of them coming in with diseases and what not.

be aware that cardinals are nocturnal, so if it doesn;t eat with the lights on, try later with the lights off. Ive never had a cardinal though........

In one tank I have a group of 4 pajama cards and in another 3 banggai's . They were all added one or two at a time I've had no problems between their groups or with any other tank inhabitants. They tend to be some of the most peaceful fish I have.
They were also all different ages and most of them came from different places. I've never even heard of them being slightly aggressive.
Maybe I'm just lucky
fwiw
Chris

i have just one in my tank and its doing great! i picked him up from my work last week and hes been eating sence the firts night. the banggai arn't nocturnal or are usually weened to day feeding straight off the shelf. and go tank raised my store only carries aquacultured fish...its better 4 the world.
and when ever u get new fish make sure they are healthy!!!

on another note keep ur fish healthy with Kent garlic xtreme just add it to the food and ur fish will get a boost in their defence against paracites!