Feeding blocks to feed fish for up to 14 days Features: Ideal for periods of absence or vacation. By maintaining a constant source of food, you help maintain the balance of the aquatic ecosystem. Avoid excess food and water contamination, as the block releases only the necessary amount of food. Easy to use: Simply place the block in the water and it will do the rest, without requiring constant supervision. Suitable for variety of fish: Designed to meet the nutritional needs of various species of fish.