This is untrue, a flowerhorn is 90% genetics and the other 10% is water quality, food, a how often it is fed. You cant make a low quality fh a high quality fh just because you take "proper care" of it. A stunner will be a stunner regardless of conditions unless its drastic. The head IS NOT FAT. Its protein, how are you going to argue a picture of a flowerhorn's head cut open? You think that red meat is fat? Its protein or muscle, there is a small sack of fat under the kok but that is so minimal.
Look at the fh's food that claim hump growth, how much protein does it have compared to regular fish food?n Okkio claims upwards of +60% protein and why? For muscle development which is the key aspect of the fh's hump.
Where are you coming up with that a fh's kok is made from fat?