Dragon Stone, is a very beautiful, highly cavernous exotic stone that is an excellent choice for decorating aquariums, terrariums, and bonsai tree displays. This stone is fairly lightweight and generally tan in coloration and is commonly found in tidal areas where constant water erosion forms the stone’s many holes and caverns. This stone is clay-based and does not have a significant effect on aquarium pH or other water parameters. We package all of our exotic stones with ample padding/protection during shipment. However, we recommend rinsing any residual dust with non-chlorinated water before aquarium usage., making it perfect for medium to larger aquariums.Features:1.Add natural beauty to your aquarium or terrarium with this stunning rockwork2.This exotic-looking rock features numerous holes and caverns formed by erosion3.Pictures are for references only. This is an order up to10 lbs. of mixed & assortment size stone4.Rinsing with non-chlorinated water is recommended before placing these rocks in an aquarium.Specifications:Weight:10lb(4.5kg)Color:brown, cyan, redSize:mixed sizes Package including10lb Aquarium decorationNOTE1.Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid.2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!3.Best advise to check the dimensions to make sure it's right for your pet!4.Product is fragile, if product damaged when received ,please contact us ,we'll send you a replacement for free.5.The stones were pulled from rivers and brought with them some earth,please use the product after receiving cleaning.If you have any questions or problems please feel free to contact us and we will try our best to solve them. with in 24 hour.Thank you for your purchase and support!