What are some dyes used for fluid flow visualization in water?

Question

Ordinary dye in water seems to dilute very quickly. I have heard of a dye made with alcohol and milk, but I have not been able to find information on what ratio of the two ingredients works best.

Answer 1

Try an oil-based dye - you need something that won't dissolve in the water. Styrofoam beads would also work if you are only concerned about surface effects.

Answer 2

There are numerous people who would laugh at the prospect of changing their destinies. This is due to the fact that it believes that no one gets more that what is written in his destiny.

Answer 3

Try potassium permanganate crystals.