ok, im sure you all know i got 4

the other day shipped to me all the way from thailand but the thing is, i realise theyre in a new environment and everything and they were under stress but all the guys seem to do is sit on the bottom of their bowls and wollow in self pity. they have been doing some halfassed flaring at each other but thats about it. most of the time they just sit motionless on the bottom. bielzubub has been eating quite well but gabriel hasnt and is definately the most lathargic of them and has hardly eaten a thing. the girls seem fine, medusa is a little bit depressed but is eating and as for angel, ive never known such a happy betta! do you think it would perk up the males if i floated a female in there for a couple of hours? i did cover them with a towel to make it all dark and relaxing and it didnt seem to help. is there anything more i can do?