Jager is fine. If you search further, you will notice that somebody has had a failure with each brand, although some more frequently than others (such as won-brothers as I noticed when I was looking into which heater to use on my tank). I use a stealth for my WC water heating needs and a Rena Cal in my sump with success. Although I must admit that due to my central air/heating and the pumps that I have on the tank, the unit only comes on every now and then in the winter (December - Feburary). Jman77 may be right, you may not even need one. Will probably depend on the tank volume and your regional location. Florida is pretty temperate in the winter.