I was randomly searching the forum and came across this old post. Very interesting. I have found that after 3 days at zero the beer is fairly clear and with another 2 or 3 days with finings added it should be ready. I am sure they must filter it as the taller the tanks the longer it takes to clear at the bottom. I am still fermenting mine for 3 weeks more out of habit but i am sure they drastically reduce that time. Food for thought.