On 27/01/2017 at 7:40 PM, Josh71 said:Well, I don't know what would be the ingredients, probably some kind of agae, and certainly I don't want to use additive/food coloring.
This makes little sense.
You don't want to use an additive? Anything you add is an additive. Salt and pepper are additives.
And you don't want to use food coloring, but you want to add something (additive) to make the color blue (coloring)?
And when you say "some kind of agae (sic)" perhaps it might be the algae specified in the very article you linked to.