Question about danios and minows fish?

[Charlotte]

well i bought 3 danios im pretty sure there 1 boy and 2 girl (not sure what type they r as i know theres many types) they look like pearl danios, anyway and i bought 3 minows which i think are all boys, i read that if kept together everything will be fine. but im looking at them now and it looks like the danios are ordering the minows about .. if that sounds right, 1 of my minows has stayed at the bottom of the tank now all day just swiming against the gravel while 1 of my "female danio" (i think) watches over him and the other other minows are swimming at the top of the tank while the male danio watches over them.. also the male danio (i think cus hes long and thinner than the other 2) keeps chasing them, say if they move or anything, he also keeps chasing 1 of the female danios .. im really worried, its a 64ltr tank and i only just bought the fish 2 days ago, i feed them once a day like the shop owner says and i apply the right chemicals like tap safe and varies other things . please help me thanks