IPW Industries Inc. Replacement gravel for filter tanks. This is a 5 lb bag of garnet gravel that can be used under any filter media. Contact us directly for other types of gravel or other filter media needs. Additional Details ------------------------------ Bullet point: SUPERIOR QUALITY: This includes 5 pounds of garnet gravel that creates a perfect under bed support base for any standard tanks. Gravel creates ideal backwash dispersion to increase the effectiveness of your water filtration, softening, or conditioning. Generic keyword: gavel gravle depot catalytic 2021 deal anti free cation resin crosslinked fulle mineral iron kdf digital metered exchange air gap demand control below substrate porous freshwater box 20 brine plate material aquariums salt stress shower sink whole house home apartment commercial