MarcoRocks is the finest all natural aquarium rock available to the aquarium enthusiast today. It is a once live natural reef rock.

All natural calcium carbonate rock. Never any chemicals, additives. Often, you can spot fossilized ancient corals in the rocks. It comes to you pest and organic free.


Sold by the pound

Size Range: 5" to 15" Long (measured at the longest distance)

Sold By the Pound: The minimum purchase is 5 lb

Small Foundation Reef Saver Rock - Perfect for aquariums 50 gallons or less, the Small Foundation Dry Live Rock pieces can range from 4" up to 8" at the longest distance.

Medium Foundation Reef Saver Rock - The most common size, Medium Foundation Reef Saver Rock ranges from 8" up to 11" at its longest point and is great for tanks from 40 to 120 gallons.

Large Foundation Reef Saver Rock - Pieces range from 9" or greater and we suggest using Large Foundation Live Rock in tanks that are 90 gallons or larger.  

How Much Rock Do I Need?

Foundation rock will be slightly different rule than the traditional 1 pound per gallon logic, and we suggest one piece per foot of display tank, but depending on your display tanks dimensions you may want an extra rock or two to ensure you have enough to complete your aquarium aquascape. Ultimately, the best results will be given if you can support each rock structure entirely with the foundation rock while providing space for flow between the rocks. We have found that selecting a few different sizes allows for multiple options when it comes to having more creative freedom when aquascaping. 

We highly recommend curing all dry live rock before being introduced into an established aquarium. 

MarcoRocks Reef Saver Foundation Live Rock, the environmentally friendly rock, works great for aquascaping. This rock is 100% free of nuisance algae and pests which can cause complete tank shut downs and is guaranteed to be free of apitasia, bubble algae, parasitic isopods, mantis shrimp, acro eating flat worms, little red bugs, fire worms, predatory nudibranchs, pyramidellid snails and other common pests. MarcoRocks Reef Saver rock comes in unique shapes that fit well together to make interesting and unique structures. All Reef Saver Rock arrives at our warehouse pre-soaked and rinsed. This is by far our cleanest rock. 

Shipping: Aquarium Specialty makes every effort to securely pack the Rock. However, the UPS handling is not always gentle on heavy products like this and they do not consider this product insurable. Because of this, there is some inherent risk with shipping rock like this across the country and it is impossible to replace or refund broken pieces. If this happens most pieces can be repaired with epoxy.