Yeah I'm agreeing with other people here. Just keep a nice size tank, feed it well, and keep the water clean. Some good foods include Hikari Cichlid Gold, Repashy Spawn and Grow, Repashy Red Rum, Repashy Meat Pie, Hikari Food Sticks, Hikari Massivore Delite, Northfin cichlid formula, new life spectrum cichlid formula, raw shrimp, raw tilapia, earth worms, brine shrimp and bloodworms (depending on how big the flowerhorn is), and crickets. Something like that will not help him grow more, all that will do is waste your money and possible hurt your flowerhorn.