If you're looking for a source of liquid carbon, I've seen vinegar recommended fairly often as a carbon supplement for Kalk. The vodka appears to be used to eliminate a limiting nutrient for bacteria (carbon), presumably to increase skimmable bacterial populations and allow the trapped nutrients to be more easily removed from the aquarium.
I would guess that if you don't mind the inevitable oxygen consumption as the alcohol or acedic acid is metabolized, either one may shift the nutrient balance in this way. The only problem I have with actually doing it is that there are a lot of assumptions that I'd want resolved before attempting to predict the effect that dosing a carbon source will have on the tank. Assumptions like, "Is carbon a limiting nutrient in reef tanks?" Things that need experimental verification to characterize when the carbon is more likely to make things better than worse.
In general, the rule I follow is to not dose anything unless I can take a measurement to (1) be sure I need it (2) be sure I'm dosing enough of it and (3) know when I might be dosing too much of it. I just wouldn't have that information for carbon. Yet.
Regards,
Ross
I would guess that if you don't mind the inevitable oxygen consumption as the alcohol or acedic acid is metabolized, either one may shift the nutrient balance in this way. The only problem I have with actually doing it is that there are a lot of assumptions that I'd want resolved before attempting to predict the effect that dosing a carbon source will have on the tank. Assumptions like, "Is carbon a limiting nutrient in reef tanks?" Things that need experimental verification to characterize when the carbon is more likely to make things better than worse.
In general, the rule I follow is to not dose anything unless I can take a measurement to (1) be sure I need it (2) be sure I'm dosing enough of it and (3) know when I might be dosing too much of it. I just wouldn't have that information for carbon. Yet.
Regards,
Ross