Red Flint Gravel, 1/2" x 1/4", 50# Bag

Red Flint Gravel, 1/2" x 1/4", 50# bag is a coarse quartz support media used as the bottom underbedding layer in mineral tanks, filters, and softeners. Placed beneath the primary media, it stabilizes the bed, protects the distributor and lower basket, and promotes even flow during service and backwash.

• Screened grade: 1/2" x 1/4" coarse particle size
• Packaged as a 50 lb bag (approximately 22.7 kg)
• High-silica red flint quartz, naturally hard and durable
• Chemically inert and insoluble across a wide pH range
• Forms the base gravel layer supporting finer media and gravel above it
• Rounded, low-fines composition resists channeling and packing

This coarse grade is typically the lowest gravel layer in a graded underbed, keeping media off the tank floor and helping distribute water uniformly across the bed. It suits larger residential and commercial vessels where a heavier support layer is needed. For layered installations, pair it with a finer gravel above and consult your system's tank-size and media-volume chart to determine how many bags your vessel requires.