New Morroca Rock, called Reef Cradle has just been added to our line up. It's sort of round chunk type shape, but is hollow in the center, so creates a cool cave for shy fish, it's more secluded than the standard Morroca Double cave. This rock could be used in your base structure to blend with the standard pieces but have the inside access for various critters. Keep in mind our volume pricing can be applied to several types to get the best discount.
https://premiumaquatics.com/search?search=Morroca+Reef+Cradle
https://premiumaquatics.com/search?search=Morroca+Reef+Cradle