I think the guys at Zeo would be somewhat peed off to hear that Zeo is an offshoot of the Vodka method.
Zeo is a highly researched system that takes the guesswork out of nutrient reduction and coral feeding and additives. If you follow it carefully and use the great support that they offer it works very well. Don't slip up though, its a German system and one needs to to follow it carefully if using the full system.
Also if you have a really big tank the cost could probably prop up the Mugabe Regime.
Thats why after researching Zeo and using it for a while, I had a good look into the Vodka method.
It uses a carbon source (Vodka/Vinigar) to feed bacteria the carbon which according to these methods is limited in our highly skimmed tanks.
Bacteria multiply and use Nitrates and Phospates in the process, the bacteria forms a food source for coral, and is removed by your skimmer.
Skimmers skim soooo much more smelly gunk using this method. It works very well as a nutient remover.
You must know what you are doing and the possible pitfalls before you try this though.