Really it's almost the same as a Freddy's. Your best food is a Quality Pellet, Says 3 Days a Week, Krill 1-2x a week, Food Sticks seems to be a fav of my Freddy's. Also Spirulina Pellets were good nutrition. I even saw him Snag the majority of the massivore pellets meant for my Oxydoras Niger Catfish. Water Changes help. Some people say if fish a dominant one, it will grow faster kept with others because it's going to try to eat ahead of other fish, and exert it's energy in growing to be top dog. Whereas a solo fish could be perceived to not need to take on that persona. Some say it's all hogwash and all based off genetics and then diet/water. But remember parachromis eat best at night time.