What is a controller and what does it do....... I know it controls lol but..
What Redfishbluefish said. All it does is automate your tank, nothing else. Most people do not even have one....to clear up a lot of this tell us about your tank and plans for the tank.. Once we know this we can better direct you to what you need.A controller is an overpriced timer and turner-on/turner-off device. I use two old-style ReefKeeper 2's to "control" my lights, pumps, dosers, etc. The newer controllers today are smart phone savvy and communicate issues with your tank....these controllers are pricey.



