Installing monitors and controllers in your aquarium allows automatic management of properties such as conductivity, dissolved oxygen, pH, redox (also known as ORP), and temperature, helping to maintain a more stable and suitable environment the aquarium inhabitants. Herts Aquatics supplies a number of solutions from simple temperature controllers to fully computerised systems controlling most assets of aquarium management. Although these systems can be expensive they may well be worth the cost on larger marine aquariums containing expensive corals and fish. Some systems are modular allowing you to start with a basic system and slowly expand its scope and functionality by adding new modules.