Shop / Products / Estes Spectrastone Deep River Pebble Estes $27.99 Estes Spectrastone Deep River Pebble Quantity Weight 25-lb Ship to me Pickup in store Add To Cart Due to supply chain constraints affecting inventory levels on some brands and products, it is possible that this item may be cut. We apologize for this inconvenience and will automatically refund any items not shipped. Information Ingredients Spectrastone deep river pebble is an ideal substrate for fresh water and marine tanks. deep river is an inert stone that will not affect pH. N/A Customers also liked Customer Reviews