Additional Details ------------------------------ Product description: 1/8″ x 1/4″ Washed Gravel Underbedding – Using washed gravel in water softeners and water filters is important because standard gravel contains dirt and debris that can clog valves, pistons, injectors, and other components. Our gravel has been thoroughly washed and is intended for use in all makes and models of water softeners, water conditioners, backwashing water filters, and non-backwashing water filters.

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