Abstract: The present invention is mainly characterized by an automatic water flow circulation device and an automatic feeding stuffs supply device. The automatic water flow circulation device is provided with a motor-operated pump, a water-filtering trough, a water-purifying trough and a heating trough. The automatic feeding stuffs supply device is provided with a feeding stuffs container and a seesaw device, a water collector on one end of the seesaw device, and a rectangular plate on one end of the seesaw device, and a rectangular plate on the other end thereof. When the weight of water in the water collector exceeds the weight of the rectangular plate, the water collector will move downward to let the water flow into the aquarium, and the rectangular plate will also move upward to let the feeding stuffs fall into the aquarium at the same time so as to accomplish the automatic fish feeding operation.

Abstract: An automatic feeding machine having a pivotally supported gravity lever for controlling a pivotally supported feeding lever. One side of the gravity lever has a weight overlapping an arch on one end of the feeding lever, on the other side of the gravity lever there is mounted a water container for receiving water from a source. The feeding lever has a feeding stopper on the other end to seal the feeding bucket. The levers are pivotally supported by shafts mounted inside a housing, the levers lying along a common longitudinal axis. A predetermined amount of water in the water bucket will initiate pivotal movement of said gravity level to free the arch end and cause pivotal movement of the feeding lever to unseal the feeding bucket, which may also be provided with a damper to control the amount of feed being dispensed.