Aquatic turtle food is designed to float for turtles, like red eared sliders and painted turtles, to find easily and eat. This food is designed as a pellet so it does not foul the water. However, the food must still be fed carefully so as not to leave behind uneaten food. Even food designed not to foul water will eventually break down if left behind in the water for too long. Turtle and tortoise food for pet land turtles is meant to be served from a dish or small flat plate and should not be fed directly on the animal's substrate in order to help prevent accidental eating of the substrate.