Thank you for you insight! I think I found a REALLY cheap laser that fits the bill (took a hint from RA_Pierce). Does this look like a scam to you/ does anything looks misleading? I couldn't post the link, so I attached a screenshot of the page (I had to make some grainer then others to upload):
Hi everyone,
First time posting to the site. Please tell me if there is a better thread to post this in.
So I need to pop a balloon underwater for an experiment. The acrylic tank has an angled mirror to redirect the laser beam to go through the bottom of the tank through a thin layer of water...