I have a 54 gal corner tank that was given to me that im considering a school of either neons or cardinals. i think my water is a little hard for wild caught cardinals, but neons are so small. ive also thought about maybe congos, or rummy nose. something i can do s school of. ?Any body have an opinion on cardinal vs neon? And- once i decide, ill be looking for a distributor where i can buy a lot of them from, so if anyone knows of a good place, please let me know.