I'd agree to some extent. Yes anthias sp do need to be fed regularly throughout the day, but also keep in mind that these are schooling fish and they are best kept in numbers. IMO the reason you need a larger tank is the ability to divert the pecking order of the clan. A few fish in a smaller tank will probably result in a slow demise of the smaller, "lower on the pole" fish. Not that I know everything but I have found that having a larger tank with more fish results in less fighting amongst the fish school.