Clear-N-Clear - Undergravel Filter 30 Gallons Designed with narrow slat openings

Designed with narrow slat openings

The canvas fabric is waterproof

inviting mat is equipped with a high-tech heat-reflective insert that absorbs and reradiates body heat

Salmon Oil

Clear-N-Clear - Undergravel Filter 30 Gallons Designed with narrow slat openingsThe Penn Plax Penn Plax Undergravel Filter combines the function of a traditional filter while offering maximum viewing since its hidden out of sight. Designed for 40 to 50 gallon fish tanks, this undergravel filter uses mechanical, chemical, and biological filtration to filter harmful pollutants from your aquarium. Undergravel filters create the most natural bacteria bed for fish tanks and provide effective aerobic filtration. Included are 4 filter