i feed zucchini and sinking pellets. nothing color enhancing. seems more genetic than anything. they demolished my staghorn algae and bba. i bought 12, one mysteriously died, the other jumped out. down to 12 and doing well. always eating.i've got 3 sae they did a great job in eating algae.they sometimes chase eachother, no aggression towards the other fish.What do you feed them?