Things should be easy. There should be one filter for cleaning water. But nope! There's a billion choices. Here's what to know
When you take care of your water softener, life gets softer for you. Kind of like taking care of the Mrs.
Ultraviolet (UV) systems are a real thing. They kill stuff in water, but only if they started off alive. Here's what you should know about UV
Reverse osmosis gets everything out of your water. All that's left is H, 2, and O.
Above sink is easier to maintain, but it's un-pretty, and it does less filtering.
You can put more filters under the sink - just make sure they get replaced per manufacturer specs.