I have seen and heard good reviews on the Berkey Water filters. (People test their filters by putting food coloring in a glass of water and pouring it through. If it comes out crystal clear, the filter is still good.)
Many people keep a spare one in their survival kits, and use the main one for daily use.
I have been using the Berkey for about 3 months and I am very impressed. The water tastes awesome and it removes naturally occurring fluoride that is in our well water, with a secondary filter.. It also leaves the minerals in the water.
Expensive filters but worth it. We filter spring water with it as well. The filters can be hand washed as well to keep the flow rate high.
I have 2 berkeys, we reallly like it so far. I cant vouch for the science behind it because we havent tested anything, but its easy to use, good quality and value for what you get.
I've used the Big Berkey and they are excellent filtration units; essential equipment for people venturing to many parts of the world. This will not be a factor to most users, but one thing to keep in mind is that once the filter itself is wet, freezing temperatures must be avoided to prevent damage to the filter element.
