Going on vacation? Worried about your fish getting proper nutrition while you're away? Then this is the feeder for you! P21 Pond Fish Feeder - For ponds and large aquariums, this unit will dispense food slowly over a 5 hour period to reduce the risk of overfeeding and is suitable for all dry foods such as flakes and pellets. The multiple compartments also allow for an assortment of foods for variety, and the large rotating hopper typically holds sufficient food for 21 day's use. The P21 Pond Fish Feeder offers adjustable feed quantity and timing ability. Fully weatherproof, the unit may be mounted on a pole by water's edge or suspended over the water. Includes AA battery and brackets and screws for secure mounting.