I feed my swords twice a day with flake that I grind up very fine with my fingers. I keep the temp at about 78 to up their metabolism a little, and I do weekly water changes. They grow pretty fast, especially if you vary their diet. Frozen baby brine are good for the first month (on top of the flake). The same goes for frozen or live daphnia after they're 1/2" or so.
If the tank has a little algae in it that'll help too, I've noticed that a lot of livebearer fry (and adults) like to graze a bit.
If the tank has a little algae in it that'll help too, I've noticed that a lot of livebearer fry (and adults) like to graze a bit.