Breed Rocks Special - 12 Pcs 2,8Cm 

Fauna Marin Ultra Breed Rocks are perfect for retaining coral fragments including hard and soft branching corals such as Acropora, Birdsnest, Montipora, etc. They fit in a standard cutting grid, in Fauna Marin Coral Deck or in small cracks or crevices in the living rocks of your aquarium. They are produced with reef sand. This material has been shown to accelerate the spread of coral algae growth and corals on the plugs.