[jaysee]

If those hikari foods are anything like the betta food, with regards to its gratuitous use of wheat along with soy, corn and potato, switching to a higher quality food will help. Krill is a natural color enhancer, and is the top ingredient in NLS foods.

BUT, if you want to reeeeeeally see them color up you need to get them in the breeding mood - that is when fish are most colorful.

 

[jaysee]

Those are better than the betta formula - they don't list wheat 3 times. The carnivore pellets have krill in them, though the food is still dyed with coloring.

Id try to get frozen krill instead of freeze dried.