15 lbs. mixed size assortment SevenSeaSupply Natural Japanese Seiryu Stone Seiryu Stones are one of the most popular hardscape stones used in aquascaping They are completely shrimp safe for Red Cherry Shrimp, Ghost/Glass Shrimp, and Amano Shimp For these product listing you are buying Pre Selected mixed stone with an estimate of Stone size, Stone shape, weight and look will be chosen by us. We will do the best to pick a mixture of sizes in each order Pictures are for references only. Stone needs a good wash before used Mixed assortment stone size up to 15 lbs. Seiryu stone are heavy in weight