Clear-N-Clear - Undergravel Filter 30 Gallons The canvas fabric is waterproof

The canvas fabric is waterproof

Water-resistant

Helps shrink body tissue and limit bleeding

as well as Big Dog’s special extra ingredients

Designed with narrow slat openings

Clear-N-Clear - Undergravel Filter 30 Gallons The canvas fabric is waterproofThe 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