The superior design of this filter makes it one of the most reliable canister filters. Its solid construction ensures a trouble free and quiet operation. Strong flow rates and superior filtration media provide optimal filtration results with very easy maintenance.Note:1.Suitable for big tank around 39.4" length tank.2.requires airline tubing and air pump (At least 5W power) to work.(Not included)3.Pls put the air pump on a place higher than the tank.