Lee's Aquarium & Pet Products Under Gravel Filter, Original, 15/20 gallon Size:15/20 gallon Encourages licking to releasing a

Encourages licking to releasing a calming the hormone into the body

Made of BPA-free materials

16% Carbs – 50

Guaranteed Analysis

so they're extra tough

Lee's Aquarium & Pet Products Under Gravel Filter, Original, 15/20 gallon Size:15/20 gallon Encourages licking to releasing aA trouble free biological filter designed with adjustable 1" daimter uplift tubes for better water circulation and multiple plate construction for easy installation. Includes airline tubing and Discard A Stone and features the fish saver elbow. Advanced design allows a separate plate installation and allso has optional flow thru set up for use with a power head. Made of special quality plastic which resists splitting and cracking.