containers for a fluid art

[x why z]

Does anybody have any-- or any ideas about how to get-- several large, transparent, water-tight containers? Huge aquariums are the obvious first solution, but expensive. The containers need to be smooth glass (or plexi?) so the view through isn't distorted by uneven refraction-- flat surfaces are preferable, but round would be acceptable, and taller is better than wider...

Here's a way to see what it is for: you need a small aquarium, a yellow highlighter (preferably Sanford "Accent"), and a tube blacklight. Fill the aquarium with room temp water (too cold reduces the effect) and let it sit for a while so the turbulence settles. Take the ink cartridge out of the highlighter, and put it in the water, then put the blacklight on top of the aquarium and turn out the lights.

The highlighter ink will start bleeding out into the water, creating an intensely bright marker that reveals the fluid patterns of the water in the tank. Personally, I think it is one of the most beautiful things I've ever seen, and I would love to do a large scale version on the playa so the BM community can see it.

If anybody as ideas about how to make this happen, please take this ball and run. Right now, to do this (on a large scale at least) involves logistics that are beyond my means, and my only priority is seeing it happen...