Thanks Kelly I had planned on doing some kind of dilution in 2 gallon bucket etc then transfer to bottles. The information is helpful. So do you think we would learn any useful information? I hoped to get handle on amount of concentration of dye at the least. If you the pro do not think that is the case then yes why go thru the trouble. I of course have tried being scientific and using dye in ponds but way too many variables to learn anything on how one compares to another. I planned on doing cost analysis as well based on suggesteed retail. Thanks for the info any others? I planned on sending email to manufacturers later this week.