What would be a good feeder fish for a RES? Was planning on maybe two or three a month. Is that too much? Right now he eats zoo med pellets, freeze dried krill, and either field greens or romaine (I try to mix up the greens a little bit so he doesn't get bored with them). I was thinking guppies but really unsure what is best. I was also going to put snails in with him hoping to help keep the tank clean but I am aware that he may eat them. I was told that the snails would be good for him if he chose to dine on them.