Yeah, that is the setup I have. While the lights are on, my reactor is running, but when they turn off, it also turns off the pump in my reactor. I don't have a DIY reactor though, I have a Rio, but the premise is the same.
Two 1 GA desktops, a 5 gallon, a 2.5 gallon, a 10 gallon, a 20 gallon, a 25 gallon, and two 75 gallon tanks, all planted.
I am an expert on algae, so ask me if you have questions. I know how to grow it, just not how to get rid of it.