What is live rock and how is it formed?

"Live rock" can be one of the most valuable elements in a marine reef aquarium as not only is it used as a building material for an aquarist's reef, but it can also play a substantial part in the biological filtration of the aquarium and add interesting organisms to the tank throughout its life.

"Live rock" or bio-rock is a natural by-product of erosion processes around coral and limestone reefs. Chunks of rubble rock, colonised by many types of micro and macro organisms, fall onto the seabed, often during tropical storms.

Figi Live Rock (cured)........................................................................$6.00 lb
Figi Live Rock (uncured)....................................................................$4.75 lb