Well....I have been trying to feed my silver arowana hikari food sticks.......problem is he has been getting fed market shrimp for the last year.....So, I got some astaxanthin and dryed it out into powder made small slits in the market shrimp and pushed a few hikari food sticks, carnivore sinking pellets and astaxanthin powder into it....he gobbled it right up....a little extra work....but more vitimins and natural color additives as well....hope the dude starts to enjoy a mixed variety of foods and starts to like the taste of these foods sticks! cause other then that....seems I will be having to feed him stuffed gourmet delicacies from here on out.....I dont even get feed that good....j/k I eat well, so does my fish. 