Who vodka doses?

[mikellini]

I've read that organic carbon sources eventually break down to acetate, which is what the bacteria use (whether it be vodka, sugar, vitamin c etc), so you might as well just dose vinegar. This is possibly also why some other carbon sources can encourage growth of cyano, as n&p reducing bacteria can't take them up immediately but perhaps cyano can.

I think the only real justification I've heard for using vodka, for example, instead of vinegar is volume and ease of dosing. It can be difficult to dose a large enough volume of vinegar at one time without affecting pH, so unless you're using a dosing pump, you need to manually dose multiple times during the day. However, saturating the vinegar with calcium hydroxide eliminates this problem, and gives the added bonus of a small pH boost and some additional elemental supplementation. Win, win, win.