G-20 Real Reef Rock Mini Reef Mix Box (9-10pcs)Reef Ready Mix by Real Reefs delivers authentic aquascaping for marine tanks up to 200L. Each box contains 910 pieces of naturally textured rock, crafted from sustainable calcium carbonate sources without harming wild reefs. Inertly dyed rather than painted, these pieces resist crumbling and develop a coralline algae appearance from day one. Pre cured in seawater and pest free, they're lightweight and manageableeach piece roughly the size of a side