the vodka induces a bacterial bloom of sorts. as the bacterial population increases it depletes the system of bioavailable N and P. Many subscribers of this method have rather nutrient poor water as a result and have to supplement amino acids. Many also use this method to "cultivate" bacterio-plankton in the water column as means of feeding sps. conceptually, vodka dosing is the brethren of zeo vit and prodibio LOL. just lower tech and less sexy.
The practice has devotees and nay sayers, mostly in the sps realm. But I would advocate a very cautious dosing of vodka for non sps systems for the benefit of nutrient export, granted the person has an efficient skimmer, before trying red slime remover.
To me, it is just a more holistic approach. Besides, vodka and sugar have been used in denitrators without ill effect for a generation. I personally have tried neither vodka nor red slime remover, but i am inclined to believe one is more susceptable to overdose than the other, with the result of a mini cycle at best, or a tank crash at worst.
Sorry, didnt mean to hijack the original poster's thread! lol