Abstract: An aerobic bacteria filtration apparatus for aquatic ponds. A generally cylindrical tube houses a plasticized media derived from horse hair or hog hair which is suitable for supporting the growth of colonies of aerobic bacteria. An intake port coupled to one end of the tube permits water from the aquatic pond to be drawn across the plasticized media by means of a submersible pump which is coupled to the other end of the tube. The aerobic bacteria digests and degrades waste products suspended in the water as it is drawn across the plasticized media, and the cleansed water is discharged into the aquatic pond. A plurality of tubes containing the plasticized media can be connected in a manifold configuration to increase the filtration capability for large bodies of water.