I got home from work, checked my tank, walked out of the room-all seemed fine-temps normal. Went to let my dog back in and bang. Pumps, lights, and tank shut down and horrible burning smell coming from the tank. I checked out the scene before sticking my hand in the tank and cut all power to the tank. In the sump one of my heaters blew up- Stealth Pro. Ever see the cartoons where some one has a dynamite stick blow up in their hand and they are left with a stick that has the sides peeled back like a banana? That was the heater-I had no idea they could literally explode. Luckily my pump is on the same circuit as heaters and when the GFCI tripped my pump was shut-down. So fortunately none of the chemicals or crap was pumped into the DT. Emptied the sump, scrubbed it clean, and with the back-up saltwater that I had, got the tank up and running. I still have two other stealth heaters in the sump going though, and it makes me a little nervous. I have used these heaters in freshwater for years with no issues, but maybe they are not good in saltwater. So my question- what heater is recommended? I would like any non-exploding recommendations. Thanks