i had a marineland stealth heater blow up in my tank, it was full of water and i hadn't done a water change to cause it. i was actually sitting on the couch watching tv and it sounded like what you'd imagine a grenade going off under water, a muffled *KRUMP* sound.
then again, they did have a recall on them for that reason.
then again, they did have a recall on them for that reason.