The Ten Essential Public Health Services describe the public health activities that should be undertaken in all communities and were developed as a companion to the three core public health functions.
Live rock is rock from the ocean that has been introduced into a saltwater aquarium. Along with live sand, it confers to the closed marine system multiple benefits desired by the saltwater aquarium hobbyist.ase rock, or dry rock, is a generic term for aragonite rock that has no organisms growing in or on the rock. Base rock is often used as filler rock in the aquarium as it is much cheaper to purchase than live rock. In time, base rock will become colonized by living organisms.
Live rock is harvested for use in the aquarium trade from collections in the wild near reefs, where parts may become detached from the central body of coral by storms. It may also be seeded from small coralline rocks by an aquaculturalist in warm ocean water, to be harvested later.ase rock, or dry rock, is a generic term for aragonite rock that has no organisms growing in or on the rock. Base rock is often used as filler rock in the aquarium as it is much cheaper to purchase than live rock. In time, base rock will become colonized by living organisms.