Back when I was breeding fw fish, Ebo Jager heaters were bar none the best on the market. At one point, I had almost 50 tanks running, all of them with Jager heaters, and never once had a problem with any of them. Not only that, they were within 1 degree of where you set them, which unfortunately is rare. About 7-8 years ago or so, they were bought out by someone... don't remember who... and for a short stint, their heaters weren't even fully submersible anymore. They have gone back to the fully submersible version, but I'm not sure on the quality. It has to be safer than the new models of Stealth, those things are dangerous.