Tetra pond sticks are nutrient-rich, highly digestible and free floating - allowing all of your pond fish inhabitants access to the highest quality of balanced elements needed for ideal growth and development. These sticks come in this air tight tub to lock in freshness and prevent moisture damage, air damage and light damage. Key Features: Contains all essential nutrients. Improves water quality. Highly digestible. Low contamination levels - better water clarity. Complete biological balanced diet.