Texas Holey Rock Natural Limestone Aquarium Decor 15 lbs
3,610. 1 offer from $6.99. Texas Holey Rock Aquarium Decor for Fish and Aquatic Pets to Swim and Hide | 20 lb, TXSHR20LB. 4.8 out of 5 stars. 20. 1 offer from $54.00. 12PK Raw Gray Limestone, Sedimentary Rock Specimens - Approx. 1" - Geologist Selected & Hand Processed - Great for Science Classrooms - Class Pack - Eisco Labs.