▎ 摘　　要

NOVELTY - cylinder body of the utility model belongs to the technical field of fish, especially ecological fish tank, comprising a glass material, the top of the side wall of the cylinder body is provided with cylinder cover, the edge of the cylinder cover is provided with a sealing strip, the side wall of the cylinder body is provided with a water outlet and a sealing cover for opening or closing the water outlet, the bottom of the inner wall of the cylinder body is paved with graphene optical catalytic stone, the graphene photocatalysis stone is provided with multiple graphene photo-catalytic artificial float grass. The utility model solves the technical problem of how to make the fish tank can effectively self-purification so as to keep sanitary environment of fish, convenient use and low cost, and effectively reduces the labour intensity.