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 rubble that has broken off a coral reef structure by natural means such as hurricanes and tropical storms. This broken off rubble is called live rock because of all the living organisms that are found on and within the rock.he many holes and crannies in this rock give it a tremendous amount of surface area for the beneficial aerobic (needs oxygen) and anaerobic (does not need oxygen) bacteria to live on. This is what makes saltwater live rock such a great biological filter for your tank.