I pose this question to those of you who are water experts. The water where I live is pretty bad so I always filter it, even if it's just for drinking. I've been using a Britta filter for my homebrews so I could use clean water, and it looks like it's just a charcoal filter. I also have a cartridge filter that I use to filter out apple particles when I make cider. I noticed they have sterile 0.5 micron filters that they sell. Which do you think would filter out water better?