Perfect-A-Flo Undergravel Filters

Scientifically designed to create a clean, healthy environment for fresh or salt water aquariums. The slots in the plates have been designed to draw water evenly over the entire plate. Heavy-duty plate is made to support rocks, gravel, etc. Fish protectors on flow spouts prevent fish from entering the lift tubes. High tube connectors keep the tubes from being knocked out by fish and prevents gravel from falling under the filter plate. Each filter includes the plate, lift tubes, airline tubes, and air diffusers. Carbon filter inserts sold separately. All measurements provided below are for the tank size (filter plates run slightly smaller to fit inside.)