You do know even if you get a monitor only package it is still a controller and all that is needed is a wifi power strip or and XP8 controller with a buss cable and terminator to start controlling things. So if you want to use it to backup heaters you can get a $40 wifi power strip and pair it with the controller. I assume you already have another way to control your heaters. The heaters sticking on is one of the leading causes of a tank crash. Heaters not coming on do not usually cause a tank crash unless you don't heat your house.Yup..that is what I was looking at. Still annoys me that I am at 300 just to monitor PH..but I dont see other options.