For that matter :lol: the red stuff could be gracillaria, which is great stuff---having a lot of trouble making it out. But I do advise against caulerpa. It's just a nasty invasive species. Whatever is in that picture, it's not cheato, which looks like green Brillo dish-scourer. What I see in there is an unidentified red macro ---but gracillaria is hard to grow, so I'm suspicious of it crawling up the strands of caulerpa---NOTHING's more aggressive than caulerpa. If it were mine, I'd keep the red stuff, ditch the green stuff, and get some real cheatomorpha from another source. If your lfs told you that green stuff was cheato, I'd be pretty incensed, and they owe your your money back. The pink stuff is definitely coralline, btw.