If you want to monitor and control the levels in your fish tank automatically and electronically then an aquarium controller is the answer. For busy people, people who work away and people who just want digital precision, it is not always convenient to manually test aquarium levels all the time. With a controller you can let the technology do the work for you.
You can monitor and control pH, mV, temperature and lighting using these sophisticated devices, some of which you can attach to your computer and monitor the readings on your own machine. For planted aquariums you can control your CO2 systems.
The range also include nitrate reducers with top of the range water parameter controllers and computers, solenoid valves, water level regulators and a range of calibration fluids.