I have bought 2 Red Snakeheads from a local fish store. I keep them in a natural pond which is 2 meters in diameter and 15+ meters deep.I have 5 Catfishes,2 Giant Gouramis and 2 flying barbs with my new snakeheads.They are just 4 inches and I want to grow them as much as they are grown.I want to know what are foods I should give for them and what are the changes that I must do for my target.