#$%^&*AU2020101797A420200917.pdf#####ABSTRACT The utility model provides a multi-functional breeding apparatus, which has the following beneficial effects: when the apparatus is used by a user, an outlet end of an external air 5 pump device is communicated with an inlet end first, the air pump pumps air into an exhaust pipe, the air rises in the exhaust pipe and is discharged from a first end of a top portion of the exhaust pipe, according to a reverse airlift principle, the rising air in the exhaust pipe may drive water in a fish tank to flow into a bacterium cultivation portion, pass through the bacterium cultivation portion, an adapter pipe and the exhaust pipe in sequence, 10 and finally flow out from the first end of the exhaust pipe, thus achieving effects of circulating water purification and bacterium cultivation. Neither parts of a feeding pipe in the exhaust pipe and the adapter pipe are communicated with the exhaust pipe and the adapter pipe, so as to ensure that an integrity of a reverse airlift passage is not affected while reducing occupation of a feeding space, a feeding basin may ensure that a feedstuff fed from 15 a first end of the feeding pipe will not be scattered all over the ground, and a heating rod is installed on the bacterium cultivation portion close to a water flow, so that a water body of the fish tank is heated more evenly. 20 1iA1/9 41 4 1 6 222 12 21 5 FIG. 1
