You can eyeball and guesstimate his stomach size roughly.
I'd feed once a day til there is a small-to-medium bulge in the tummy. If all is right, the bulge should dissipate by the time of the next feeding in fish that young.
The older he gets, the less frequent the feedings should be. Adults are usually fed once or twice a week a large amount. One of the common fatality reasons in adult RTCs is overfeeding and clogging of the digestive system.
I'd feed once a day til there is a small-to-medium bulge in the tummy. If all is right, the bulge should dissipate by the time of the next feeding in fish that young.
The older he gets, the less frequent the feedings should be. Adults are usually fed once or twice a week a large amount. One of the common fatality reasons in adult RTCs is overfeeding and clogging of the digestive system.