This part scares me:
The Theo ‘minimum water line’ requirement must be followed for proper operation.
Just be sure you get a gazillion reviews before you plug in this heater if you dont have a controller. The only heater I would use without a controller is a Jager. A $20 piece of equipment can easily cost you your entire reef.
Keep in mind that reefs have a lot of water movement. If that heater goes underwater, is it ok? If the water line is low, what happens? Just a few things to think about.
