I totally agree with Maxzmom!
You shouldn't have purchased the females with out knowing how many could be kept together, if you had researched you would know that females need to be kept in large groups to spread out the agression, its very rare to be able to keep 3 females together without them getting very agressive, the only girls that could be done with would be sisters or girls that have been together for a long time. And you definitly couldn't keep 3 together in a 5 gallon, that doesn't give them a lot of room to get away. Take the girls out, leave one in the 5 gallon, and get the others new tanks, 1 gallon or larger, and upgrade your boys tanks while you're at it, I'm sure they're not thrilled with being in a 1/4 gallon of water.