Maybe. But vodka is not without its problems. Reduced O2, for example. Or worse, you may speed up the consumption of nitrogen species (ammonia/nitrite/nitrate) by bacteria suspended in the water (not on solid surfaces where bacteria performing the nitrogen cycle typically reside), and those blooming bacteria that may not be appropriate for continuing such consumption unless you keep always adding a carbon source for them. If you cut off the carbon, you might even have an ammonia spike.
In my opinion, this proposal is well into the range of experimentation, and the results are, IMO, at least as likely to be undesirable as desirable.