I got that gadget that CoraLife puts out...I think it's fairly new, cost about $18. It has worked great so far, of course I've only had my tank set up for 2 weeks. it has 2 plugs for "daytime", 2 plugs for "nighttime" and 4 plugs that run constantly. depending on heaters, lights, powerheads, etc, you may need more, but it's worked good for me...I have 3 powerheads, lights, lunar lights, and I did have a heater (turned it off).