I have tons of mysis in all tanks
That's really wonderful! However (and take my word on this) you will be surprized how quickly a larger Regal can wipe out your 'pod population. That's probably what he/she is eating now, but it would still be a good idea to continue to try and get it to eat frozen...there are other things besides the mysis that you can get in frozen form that will benefit the Regal's health (see my list). ;)

Wendy

OH...BTW...what other fish do you have in your tank?