What is the stocking level for these handsome fish? Most internet searches seem to say a 55 gallon and to for 6 as they are a schooling fish. Any that I've seen in display tanks don't really seem to school much, atleast not like tetras, rasboras and the like. I have a platned 38 gallon 3'x'12"x20" with a pair of angels, male and female apisto double red, a school of cardinals and an l200 pleco. Would say 3 be ok in this? I'm able to get some at a pretty good price. Thanks.