Is anyone using a carbon block filter for brewing water in stead of a RO system? I've been using filtered water from one of those stand alone machines but I noticed the last time I got water there it wasn't the best tasting. Don't want to spend the bucks for a RO system unless I can find a decent one for under $100. I did find this one, https://www.amazon.com/Portable-Rev...95334&sr=8-16&keywords=ro+water+filter+system, but not sure of the quality. I also saw this one, https://www.amazon.com/Reverse-Osmo...95334&sr=8-13&keywords=ro+water+filter+system. Then I thought about just getting a filter housing and a.5 micron carbon block filter to use. Only problem with that is I have no idea how I would treat the water. What do you guys suggest?