Original Under Gravel Filters

Trouble-free Biological Filter designed with adjustable 1" uplift tubes for better water circulation. Multiple plate construction for easy installation. Includes airline tubing and Discard-A-Stone and has a fish-saver feature. Advance design allows separate plate installation and features optional flow-thru set-up, which can be used with a power head. Made of special quality plastic which resists splitting and cracking. All measurements provided below are for the tank size (filter plates run slightly smaller to fit inside.) Carbon cartridges and air diffusers included.