organism said:not only that, but food coloring is probably a lot more expensive, and a lot more water soluble, than the uber cheap dyes that are probably available in bali and elsewhere, I wouldn't be surprised if it was a regular clothing or hair dye, which could possibly have negative effects on the tank that the corals are put into as well
i would think any oil based dyes (like those for shirts etc.) would be toxic to dye corals with.
my guess would also be food coloring that is used. it would have to be water soluble, and non-toxic.....
prob the same thing they use to dye carnation flowers possibly?
