Gray Granite 1.5" mulch-refresh chip stone

chip stone

White Marble ½": Same bright white stone at a much smaller size

choose Coarse Sand for everything else

Completely different aesthetics

Will Crushed Concrete leach into the soil or affect pH

Gray Granite 1.5" mulch-refresh chip stoneGray Granite 1. 5" Heavy Duty Stone for Deep Drainage & Backfill Also sold as #4 Stone (Crushed Granite) the contractor spec name for the same material (AASHTO M43 ASTM D448 No. 4). Gray Granite 1. 5" is the size that drainage installers, septic contractors, and excavators reach for when the project calls for serious water moving capacity. The larger void space between stones means water flows through fast critical for French drains, septic system