For blues you need to feed him greens, that's why I feed hikari excel because it has spirulina and what not in which is really good for blues. Just make sure he gets a good mix or all the foods.Thanks. This will for sure brighten up the red coloration on his shoulders? I know it’s kind of a lot to ask for but I’m wanting to Brighton red only on shoulders and fins and not as much on the body. I really live the electric blue that fades to a light blue on the mid body and really want to keep that. What do I search on Amazon to find that?