Turtles and terrapins require a well balanced diet that contains ingredients rich in calcium. Calcium is important in helping to maintain proper shell condition and health in turtles. Nutrafin basix Floating Turtle Gammarus Pellets contains gammarus shrimp which are a highly nutritious invertebrate that are a natural source of calcium. Nutrafin basix Floating Turtle Gammarus Pellets should be fed as a core diet. The easily digested floating food sticks are effortlessly consumed by turtles, helping to control their messy feeding habits. Turtles and terrapins should be fed a varied diet containing freeze-dried foods like Nutrafin basix Turtle Snack (freeze-dried Gammarus).