One greedy betta can quietly reorganize a whole community tank around himself. He learns where food lands, arrives first, eats at speed, and keeps eating while slower fish are still deciding, so the tank ends up with one round betta and a group of tankmates running slightly hungry. He is not misbehaving; he is a surface feeder built to take food fast in the wild. The keeper's job is to change the geography of feeding time so his speed stops deciding everyone else's meal.
His Own Corner, Fed First
Start every feeding the same way: lure him to his regular corner with an opening bite, and let that first taste anchor him there. Feeding him first, in a consistent corner away from where the community food will land, buys the other fish a head start. Give him his full share in that corner in a couple of small offerings rather than one large drop, because a betta's stomach is small and a measured share eaten slowly keeps him occupied longer than a mouthful he can finish at a gulp. While he works through his corner, the rest of the tank gets fed elsewhere, and by the time he leaves his post to investigate, their share is already eaten.
Hold Him Briefly While the Others Eat
On days when corner feeding is not enough, float a small container in the tank and hold him in it briefly, at the surface, in the same water and at the same temperature, while the slower fish eat without him. Scoop him up gently with the container itself rather than chasing him with a net, feed the community, and let him back out as soon as their food is gone, keeping the pause to the length of one feeding rather than letting it stretch. Used this way, the container is a feeding tool, not a punishment, and many bettas learn to swim toward it at feeding time. If he is frantic in the container, shorten the pause and lean on the corner method instead.
Scatter the Community Food Widely
Whatever the others eat should land everywhere at once. Scatter their food widely across the surface, in several spots away from his corner, so no single point becomes a contest he can join late and still win. Spread widely, the food lets shy fish feed at the edges while bottom feeders find what drifts down. Feeding the community at the far end from his corner, immediately after his first morsel, stacks the timing in their favor as well. Watch his waistline over the coming weeks as your scorecard: viewed from above, a betta in balance keeps a smooth taper behind his head, while a steadily widening middle says extra food is still reaching him somewhere, and the corner, the pause, or the scatter needs tightening.
What Other Keepers Have Already Solved
Greedy males are such a common community-tank problem that other keepers have usually tested the answer to your exact version of it. In KinsLe, Circle of Love is the network where free accounts connect with other owners, and keepers there share the practical detail that general advice leaves out: which corner lure held a determined male through a whole feeding, how long a floating pause needed to last for a particular group of tankmates, and how a scatter pattern was adjusted when one slow fish still kept missing out. Reading how another keeper sequenced the same three moves often saves weeks of trial and error.
Other keepers in your Circle of Love on KinsLe trade the same kind of notes, covering which corner held a greedy male and how a floating pause was timed.