NOTE: This rock is completely DRY, not alive and can ship safely UPS Ground. This is a 20lb box, mixed sizes

Average sizes are 5" to 8" long, and 1-2 Lbs each plate, but this can change dramactically depending on what has come in.

Natural calcium carbonate rock

An exciting new rock from MarcoRocks puts a new meaning in "Reef Safe"

"Reef Safe" This product will never ever be collected from a living reef

A product of the USA

The best base rock you will find for your aquarium. Each box is hand packed by a reef tank enthusiast to ensure you will get what you need and want for your reef tank or salt water aquarium. Marco Rock dry base rock is the most porous, lightweight and has the greatest surface area of any rock we have seen. Marco Rocks the finest dry rock makes the finest live rock available. Let us know specific sizes and our packers will try and accommodate as close as possible. Average rock size on Marco is usually around a medium sized rock. Average 25lb box for example would be around 5-7 rocks, but this can vary.