They all seem to need a little bit different things. Fish that have floating problems get more greens - or gel food. Fish that are tiny get more PRoGold. Fish that are being prepped for show get up to 4 meals a day of varied foods. Red fish get one set of foods, white another. Some tanks are more heavily stocked, and they need smaller feedings, other tanks have big monsters who need large pellets twice a day.
When a fish is too big for a show category, it is fed less.....or if a fish is not feeling well, it goes to peas or gel only.
I rarely fast a fish - unless there is definate evidence of constipation.
I guess if I had to suggest anything - it is to see what your fish will eat and how they respond to what they eat. If they handle two large meals a day and you are not vacumning out large globs of wasted food from the tank, then feed them that way. If they need smaller amounts perhaps more often, try that. If they are not growing - pump the calories and protien. If they are floatly, boost the greens - multiple times with small amounts...... REad each fish,each tank.....they are all different.