I have been reading your blog for some time. My neighbor makes wine and said I should try it. I have a question. He uses a wine filter to clear his wine. Do you have to filter homemade wine? He says it is not but I don't see how if you don't have something to clear it. Eric ----- Hello Eric, Let me start off by saying that you can make perfectly clear homemade wine without using a wine filter of any kind. You do not need to filter a homemade wine for it be clear. Let me explain why... What causes a wine to be cloudy is mostly wine yeast. The yeast multiply themselves into a colony of incredibly huge numbers during the fermentation. This wine yeast is finer than flour and adds a milky look to the fermenting wine must. Even though the wine yeast cells are microscopically tiny and can easily be stirred-up by the fermentation. They will also settle out through gravity once the fermentation activity has stopped. The other stuff like the pulp and tannin from the fruit will fall out even before the yeast. If you do absolutely nothing, the wine yeast cells will settle out on their own, usually within a matter of days. This is why you do not have to filter the wine. It will become surprisingly clear on its on if given a chance. If you would like to speed up the process you can use something called a fining agent. A fining agent is something that you add directly to the wine must. It collects the particles together and drags them to the bottom more quickly than they would on their own. A particular fining agent routinely used by many wineries is Bentonite. You may be asking yourself at this point, "if the wine yeast will settle out on their own and I can use fining agents to speed up the process, then why does my neighbor have a wine filter? And furthermore, why do wine filters even exist"?