My tip would be to go with live fish, but don't put them in the water, just let them flop around. After I got my first pair of puget's, I tried to feed them for weeks, even fish in the water. I was close to giving up when I put them in the cage,with the fish flopping around the garters went nuts. I'm pretty sure I saw the male twitch a few times, because he didn't know which one to eat first.