Using an Aquarium controller is a very convenient way to monitor the various water parameters in your saltwater aquarium. By using an aquarium controller it will allow continuous readings of your saltwater aquarium’s pH, ORP, salinity and temperature. Digital read outs make it easy to see what is happening in your tank parameters are at a moment’s notice without having to get various test kits out.
An aquarium controller is monitor but it also will include an electrical outlet that can be used to turn on or off components like heaters (for temperature control), solenoid on CO2 regulators (for pH control) and ozonizers (for ORP control).
Several popular brands for hobbyists are American Marine, Aqua Medic and Aqua Logic. All-in-one monitor/controller brands include Neptune Systems, AquaDyne, Digital Aquatics ReefKeepers and Elos Biotopus II Aquariums Controller.