Caulerpa Question

[Grandczar]

I just read something on a website im having a hard time believing.

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refugia that do not contain Caulerpa work better. Caulerpa release lots of terpenoids, which are not good for corals. In my refugium I grow mostly calcareous algae. Halimeda is the one I prefer

I know there are terpenoids in caulerpa to discourage snails etc. But does it release into the water and how? Or is this guy smoking crack?