For the proper growth and health of a reef aquarium, a calcium reactor is the reef aquarist's best friend. It allows proper dosage and administration of tricky calcium solutions crucial to the growth and survival of your invertebrates. This calcium reactor from ESU operates manually or automatically, depending on what supplemental equipment you use with it - see details below.
Prepare at least 5 gallons of saltwater for use with the reactor. Ensure that there is adequate unobstructed space for the reactor location.