Remember those little black tablets you would light during the 4th of July, Canada Day or any other holiday celebration where fireworks were there a plenty?
Well in this video the chemical you see being spread across the bottom of the tank is Hg(SCN)2, or Mercury(II) Thiocyanate, its pretty much the same thing ( I remember them being called snakes) So you know these products are banned now, probably a good thing considering mercury vapours are pretty dangerous.
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