I would like to see some studies or articles about the vitamin C and corals/zoas.
Vodka dosing is unnecessary for any type of aquarium to be healthy.
These alternatives are ok, like many others, but sometimes people go kinda crazy about them. Like some that really NEED to dose the vitamin C every day and so on. Or give that vodka to the tank when get home from work. And when they can't, things break down and animals may suffer the consequences.
Not to be critical, rude nor to judge. Just my opinion.
I'll wait for the studies, if you please reply with a link or references.
Thanks.
Grandis.