Premium Fish Food is a Hormone-free, color-enhancing formula. Spectrum food is made with high-quality easily digestible krill, fish-meal protein, and four all-natural color-enhancing ingredients for a balanced diet that boosts immune system function and enhances the full spectrum of your fish's color.Newest lineup from featuring the Nature seriesNo artificial preservatives, flavoring, or colorsExtra garlic and nutrients help fish resist stress betterMade in the USA Fish FoodAll new life spectrum products also contain a generous inclusion rate of garlic (allium Sativum) with the Thera-A formulas containing a mega-dose of this natural anti-parasitic ingredient. All ingredients used are almost identical since we cannot find anything better than what we are using. However, the crude analysis will be different due to the percentage of ingredients incorporated into a specific formula.