EMERGENCY!! My Glass Thermometer broke!!

hitman12131976

Resident Calculus Teacher
Apr 30, 2007
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Covina, CA
www.eosclan.com
I don't know if I should be worried. But the little glass thermometers that can be used inside of a tank broke from the bottom. It broke into three pieces (the part that holds the little weights). The part of the thermometer that is red is still in tact. The part of the thermometer above the red wax part is still in tact. Just the bottom part of it.

I cleaned up the three glass parts out of the tank, but the little round weights went ALL THE WAY down under the substrate. I tried to vacuum them up but they seem to be too heavy. They've disappeared into the substrate and there is no way for me to get them out unless I take all the water out of my tank, plants, fish, etc. and clean it out completely.

The fish cannot reach the weights as they are under at least 1 inch of substrate.

Here are my questions:

1. What are those weights?

2. Are they harmful to the fish? (yes if they are eaten, probably, but they can't be as they can't be seen by even my eyes)
 
The little balls are most likely little lead BB's I don't think they would be bad because people use lead to hold plants in place.
 
Sound like you were lucky, as you didnt get any mercury in your tank. That stuff is toxic. I would agree, the weights are probably just lead and shouldnt cause a serious problem.
 
I don't think they actually use mercury in those anymore. They started phasing them out (atleast in the US) some time ago for the stated toxicity issues. Most of the glass thermometers you get now are alcohol based afaik.
 
Yeah, the thermometer that I had as made by TopFin and it has NO MERCURY. Phew! I'm gonna get a nice clean magnet and see if I can get those little lead beads to come out of the substrate. Thanks for the info guys!
 
Sorry but lead is not magnetic...
 
Sorry but lead is not magnetic...

Darn, well, I guess I'll take them out in a year or so when I do a complete clean of the tank.
 
The balls are probably stainless steel, so don't sweat it. Just try to remove all the glass you can.

The thermometer part contains alcohol, probably not enough to harm anything in all but the smallest of tanks.

Digital thermometers rule. You can get a pen or keychain type one for <$20 at any scientific supply place online (Fisherscientific, VWR etc.), probably even less on ebay.
 
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