Real Reef Rocks

[josh0302]

Wait, so the purple stuff on the "Real Reef®" rock isn't coralline algae?

 

[billsreef]

It's purple dye

 

[dkeller_nc]

It's purple dye

Technically, and really deceptively, they claim that it's not "dye". Instead, it's purple pigment. As a woodworker, I can relate that the distinction is that a dye is soluble in the carrier that it's applied with, while a pigment is a finely-divided insoluble colored material that's applied with a carrier.

That's rather obviously a distinction without a difference, but it allows the company to claim that there's "no artificial dyes" in the product. :rolleye1:

 

[ajespo85]

+1 on Marco rock.