One of the single best things you can do for your aquarium, your life and your wife factor is to purchase an aquarium controller. We only sell one controller because it is the best controller that exists and no other brand is even close. We suggest every aquarium owner should have an Apex by Neptune Systems. In addition to all the incredibly cool things an Apex does, first and foremost it protects your tank from all sorts of very common catastrophes like overheating due to faulty tank heaters or HVAC issues, fires from cheap plastic powerstrips, leakages and overflows, out of range parameters, etc. And, once issues are detected, the Apex takes corrective action to reduce the likelihood of serious damage and then notifies you so you can take it from there. The Apex has saved aquarium owners hundreds of thousands of dollars in livestock, equipment, flooring, etc. Leaving home for 2 hours or 2 weeks will no longer involve the anxiety of wondering what you will come home to. This reason alone is enough to justify purchasing an Apex.