The conventional wisdom is that a school of your chromis would whittle down to one over time.
There is a minority opinion that if fed in large enough consistently enough, the behavior changes and they do well together.
I saw this happen with firefish in my tank. One grew fat and was out all the time, the other hid in a corner and wasted away. Then I had to massively over feed my tank for weeks for another issue. Now they are both out equally and equally fat, and each have their own side of the tank.
Depending on your plans for your tank, you might be interested in seeing if this works with groups of chromis.
There is a minority opinion that if fed in large enough consistently enough, the behavior changes and they do well together.
I saw this happen with firefish in my tank. One grew fat and was out all the time, the other hid in a corner and wasted away. Then I had to massively over feed my tank for weeks for another issue. Now they are both out equally and equally fat, and each have their own side of the tank.
Depending on your plans for your tank, you might be interested in seeing if this works with groups of chromis.