coolants?

[Iconaught]

Straight Tonic Water (Canada Dry) obviously per the thread would not work.  However, I'm picking up what you are throwing down   Quinine is the ingredient in Tonic water that is fluorescent, it is also a corrosion inhibitor.

 

Quinine can be acquired from medicine supply shops possibly from health-food stores.  Quinine is a muscle relaxant...   

 

I would be interesting to see if a Quinine solution could be an additive to a cooling loop as the result would be pretty freakin' cool.

 

If I had a cooling loop to experiment with, I would try it out.

[othertomperson]

You can get coolants that have the same UV effect as tonic water. I'd be careful, though. UV light can degrade plastics. It might not be good for your tubing long term.

[brandishwar]

Quinine's most important trait is suppressing malaria. My father keeps a steady supply of tonic water for that reason since he acquired recurrent malaria in the Navy. I've seen him during a recurrence -- it's not pretty, which makes me wonder what it was like when he acquired it...

 

As for using it in a water cooling loop, my only concern would be how it's acquired. If you can get a vial of it already in solution, you'll be golden. If it comes in any kind of solid -- pills or powder, for example -- then read on how to effectively make a good concentrate for it to ensure that no solids of it remain in the solution. Usually hot or boiling water is used for this purpose. Note: do not put distilled water in the microwave as it could super-heat.