HLLE and coral snow

[AgentKooper]

I don't know who started this meme-trend of dosing calcium carbonate and calling it "coral snow".....it really doesn't take much, does it?

I would suggest leaving that product to the brewers, looking up "marine snow" and its actual composition and function. There you have something to emulate and experiment with.

Not the end-all reference on it, especially not with respect to marine snow and corals, but a good start:
https://oceana.org/blog/marine-snow-the-oceans-endless-snowfall-explained/

How is the linked article relevant? Calcium carbonate is said to be a flocculent that mimics the action of marine snow. Nothing in the article contradicts that.