Nutrafin Basix Staple Food, Double 24gNutrafin Basix Staple Food, Double 24g Nutrafin basix Staple Food is specifically formulated for daily feeding of all tropical fish. Basix Staple Food contains a balanced formula that includes all necessary protein, amino acids, fibre, minerals and vitamins to help ensure the health and well being of aquarium fish. In general, aquarium fish should be fed a varied diet containing freeze dried foods such as Nutrafin basix Mysis Shrimp, Nutrafin basix