My submersible heater just blew open with a pop, sizzle, and a lovely burning smell. I got it out of the aquarium ASAP, and worried about heavy metal contamination, put in some dechlorinator with heavy metal chelator and changed out the carbon in the filtration system. Fish seem to be ok, but all the inverts (corals, anemones, starfish, flame scallop, etc.) look very unhappy. I'm getting ready to do the first water change. Any suggestions? Was it the current, the contamination from the heater components, or was adding dechlorinator a really bad idea? This is my 40 gal tank. I've got a 5 gal cycled -- should I move the corals there until I can do a few water changes? Help!