Broadly speaking, most frozen foods are not regarded as being that nutritous, despite many fish going bonkers for them upon addition. Fish will grow bigger and quicker with a good mix of foods, just like us, so that there are no serious deficiencies in the way of amino acids (protein/ muscle building blocks); minerals; vitamins etc.
I wouldn't feed frozen foods more than once or twice a week. The rest of the time use a mix of high protein granulated foods and a good quality flake or pellet.