Half a croissant, on a plate, with a sign in front of it saying '50c'
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Galileo fish

Another fish saver
  [vote for,

Inspired by [phoenix]' idea. Make a fish from glass and balance its weight like the balls in a Galileo thermometer (link). It only takes one fish, the user trims it following simple (?) instructions to match the desired temperature of the aquarium. Put the glass fish into the aquarium. When the temperature gets too high the fish floats belly up at the surface first, before the other fish suffer.
kbecker, Jun 07 2004

Galileo thermometer http://www.howstuff...com/question663.htm
[kbecker, Oct 05 2004, last modified Oct 21 2004]

[phoenix]' idea http://www.halfbake...m_20for_20fishtanks
[kbecker, Oct 05 2004]


So much better than my idea.
phoenix, Jun 07 2004

       Given that so much more than the temperature can be wrong, can we also have the color of its body indicate acidity and the color of its tail indicate harmful bacteria?   

       In fact, can we have it bluetooth the environmental conditions to our PCs?
DrCurry, Jun 07 2004

       Cool (+)   

       Swimmingly good idea. But I'd also really like to see a traditional Galileo Thermometer that sported multi-colored fish-shaped weights. I'm not a customer for the aquarium, but I'd buy three of the custom made fish thermometers in a heartbeat. That's novel, useful, wry, and universal.
jurist, Jun 08 2004

       excellent and I love the docs add ons.
etherman, Jun 08 2004

       [DrCurry] You want to lure me onto the thin ice of magic, but as you already point out some body parts can be used as indicators. Acidity, oxygen content, I don't know about a reversible indicator for bacteria. It would be fun to have a sightly different color every now and then (not too much off because that would indicate a problem).   

       Bluetooth may not work because the water shields RF.
kbecker, Jun 08 2004

       Neato. +
sartep, Jun 10 2004

       Great idea for noble cause (+)
vedarshi, Jun 10 2004


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