Red Flint Gravel 1/4" x 1/8", 50# Bag

Red Flint Gravel 1/4" x 1/8", 50# bag is a fine-graded quartz support gravel that sits between coarse underbedding and the working media in filtration and softening tanks. Its smaller particle size bridges the gap between larger base gravel and fine treatment media, helping hold the bed in place and keeping media out of the distributor slots.

• Screened grade: 1/4" x 1/8" fine particle size
• Supplied in a 50 lb bag (roughly 22.7 kg)
• Dense, high-purity red flint quartz
• Inert and insoluble, so it does not alter water chemistry
• Used as an intermediate gravel layer above coarser support gravel
• Uniform grading reduces fines migration and bed disturbance

Because of its finer sizing, this grade is commonly the upper support layer in a multi-tier gravel underbed, cushioning the media and improving backwash distribution. It works in both residential and commercial mineral tanks. Layer it directly above a 1/2" x 1/4" grade for a graded bed, and refer to your tank's underbedding specification to calculate the correct number of bags for your vessel diameter and height.