The only information I have about it, is going from:
1.
Presentation, pdf file
p.19 shows the schematic drawing of filtration unit, containing 3 chambers.
1. Water from the tank enters the first chamber (is it mechanically filtered, or just empty chamber for detritus settling (seriously doubt this), or just passes through the empty chamber - who knows.
2. In the second chamber the water passes through biomedia.
3. And thorough the 3rd chamber (empty again?) returns to the tank.

I wouldn't call this "vodka"
2.
Her own
article, translation by Google says:
Filters and pumps:
Interior biological filter 54 3 1000 l / h
A quick filter 1500 4500 l / h
The basin has been running for 8 years and without properly skimmer.

Again, why vodka is not an answer
The tank is filled by sun corals, fed every nigh by defrozen Artemia.
I have ~1/30 of the mass of her suns, fed only twice a week by similar food, and know, what amount of the smallest floating particles, that tubastreas won't catch, and amount of dissolved organic compounds it produces. Tank was skimmerless for years, and all of this was removed somehow - the tank is crystal clear.
3.
French article, describing her tank (translation again by Google), mentions:
Filtration: biological filter integrated under the guidance of Peter Wilkens, capacity 36 litres, retrenchment of coarse coral sand and glass surfaces. Using Rowaphos against phosphates.
Substrate: coral sand late 3 cm thick, cleaned each week.
Somehow I don't think, that 36 l of a vodka were used
No, I'm not nasty

, just making a point, why one word answer, a) impossible for the tank, known to be skimmerless for years, b) having nothing to do with the filtration unit, she describes, is not an answer for the question, I asked
Looking for more information, as anybody of us.
Fairly good chance on the specialized forum.
And I appreciate the good intentions, seriously and deeply.