i think they are pretty healthy and happy they like to make more little jags than eat. when they are together they spawn constantly and half the time they eat their fry i dnt know why they get a good selection of food. i have had seperated them befor and they do eat better but there color is not as good and i dont think they like to be seperated so i dont know if the 125 will help i think they will keep spawning and eating less no matter what size tank thanks for the reply.