I broke a thermometer in the tank and the stuff fell out! - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 17 Old 01-24-2007, 10:36 PM Thread Starter
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im surprised at the lack of knowledge aquarium/terrarium owners have on these glass thermometers

Doesnt anyone know the contents of these thermometers?

I've asked in 3 different forums and nobody is 100% sure.

Maybe people dont use these anymore. :\ heck i wont be using them anymore. I just got my digital by Hagen and i love it.

The red liquid in the thermometer is Dyed Alcohol.

The balls are used to keep the thermometer up right.

20 Gal Long
Justice-Hatchling W. Painted Turtle
Tweek-Chinese Algae Eater
African Driftwood
Fluval 305 Canister Filter


10 Gal-guppy breeding tank
2 Pregnant Guppies
Anacharis, Corkscrew
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post #12 of 17 Old 01-25-2007, 01:34 AM
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They actually arent that easy to find around here anymore. Most stores only carry the suction cup plastic ones or those stick on strips that change colors...along with the 25 dollar digitals. And yes the red liquid is dyed alcohol...says so on every single package I looked at today.
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post #13 of 17 Old 01-25-2007, 11:39 AM
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Radlations. Your questions have already been answered.

You've been told what the liquid is and what the "balls" are.

There is no law mandating what the ballast be made of. However, they are usually steel or lead.
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post #14 of 17 Old 01-26-2007, 12:19 AM
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My mistake, I apologize, I misunderstood what kind of thermometer you were using. Around here the only glass ones easily found are still using mercury...the ones here like you're talking about are all plastic now days.

Dawn Moneyhan
Aquatics Specialist/Nutritionist
Juneau, WI
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post #15 of 17 Old 01-26-2007, 11:36 PM
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My first thought was 'mercury' as well, but is lead any safer? I'd still do a thorough tank cleaning just to make sure. :)

You know what the definition of hobby is: something of interest that is going to cost you lots of money!
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post #16 of 17 Old 01-26-2007, 11:54 PM
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lead is no safer than mercury :/ 1 drop of lead can kill you.

110 gallon - Planted Tank
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17 gallon - Goldfish/RosyRed Pond
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post #17 of 17 Old 01-27-2007, 01:43 AM
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I'm gonna have to go ahead and disagree with you there. Mercury causes problems at a much lower concentration than lead.
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