Click here to shop all reef! Foundation Rock - Flat-Bottom Rock Base for Saltwater Aquariums Foundation Rock by Marco Rocks is a precision cut version of Reef Saver Rock. These rocks feature a smooth, flat bottom, providing a stable and secure base layer for your aquarium aquascape. A stable foundation supports complex rock structures while improving water flow and minimizing dead zones around the substrate. Like Reef Saver Rocks, Foundation Rocks are 100% natural calcium carbonate sourced from ancient, fossilized reef formations. Each rock is free of chemicals, additives, and dyes allowing the rocks to stand apart in quality, sustainability, and performance. All rocks are chosen based on color, high porosity and structural integrity. All Marco Rocks undergo a proprietary cleaning process that is free from chemicals, ensuring each piece is ready for use. Marco Rocks is an environmentally conscious and aquarium hobbyist trusted brand! What we like about MarcoRocks Foundation Rock Reef Safety: Foundation Rocks feature no chemical treatments and are pest-free and reef safe. Enjoy an eco-friendly and sustainable choice. MarcoRocks are never harvested from live reefs. High-Quality: Foundation Rocks are ultra-porous and support biological filtration. Each rock features a smooth, flat bottom for stability and easy placement. Great for supporting main rockwork in the tank. How many pounds do I need?We advise 2 x Tank volume in gallons = Total amount of pounds required
