cchhcc;3033893; said:Clean water is the important thing.
Also, opinions vary, but IMO many fish posted on this site are overfed. That second picture above is an example of an overfed fish.....again IMO. The first picture shows the shape a trimac would have naturally. You can force feed your fish to the point that excess growth results in an unnatural shape.
Keep in mind that fish do not have a well developed "appetite inhibitor." They generally try to eat 24/7 in the wild since food is so scarce. They cannot constantly find food, but they need to continuously look if they are to survive. In an aquarium, they will eat to the point of being unhealthy.
If I were going to try to grow a fish in a healthy manner at a reasonably high rate, I'd feed several small meals a day and change water several times a week.
Second. Nothing works as well as variety and small portions more in conjunction with clean large frequent water changes. It also help if you can try and be as specific to their natural diet in the wild. Protein vs. Carbs
Mo