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#1
08-15-2006, 08:00 PM
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If you have spilled mercury it is not just your tank that you have to worry about, but your own safety.
Here is information on how to handle a mercury spill. http://www.dnr.state.wi.us/org/caer/.../spills.htm#do 
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#2
08-15-2006, 08:50 PM
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I don't think mercury has been used in thermometers for many years so I highly doubt it is that. It is probably a metal of some kind though so you should definately get them out of there asap.
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#3
08-15-2006, 09:18 PM
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Yeah, I think most aquarium thermometers available today use the red fluid inside them. In my case, the thermometer inside the glass casing wasn't damaged so none of the fluid leaked into the tank. The Magfloat took care of the rest.
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#4
08-15-2006, 09:42 PM
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Hey,
You can still buy mercury thermometers, but they are rare now as they are bad for the environment if broken or not disposed of perperly. The red ones are filled with dyed alcohol. Lead is also a heavy metal and very bad for mother nature if just spread around. And like mercury, it is very bad for us if inside our bodies. Any-hoo, the balls are some other dense metal (as mercury is liquid at room temperature), either iron or a steel of some sort. They have atleast some iron in them as they were attracted to a magnet. ( Iron, nickel, and cobalt are the most common magnetic metals - so if it was lead, it would not have stuck to your magnet) I don't think you have anything to worry about. Hope this helps.
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