The apex system can control just about your whole grow. Lights, ph, dose just about anything. Can tell you if water leaks on the floor. Auto top off. Controls fans by use of temp sensors. Theres outlets you can add to the system that you can set up to operate off the system. On off as needed. Like turning your pump on and off if it gets too hot in the reservoir. Pretty cool stuff. Its made for reef tanks but would kick ass with a hydro system.
I am not affiliated with APEX in any way. Just passionate about my new and previous hobbies.