It is – and it has been in use for several hundred years. It is a good choice because it mimics the natural filtration of spring water.
The pros are that it requires little or no chemicals, no electricity, minimal supervision, minimal expenses, fine sand and gravel are easy to find, and is incredibly eco-friendly.
However, the cons are that the water running through it must have low turbidity in order for the entire system to function properly and since water must be added, one must monitor how much water is going in and coming out.
Let’s put it this way, a sand filter is cheap and better than no filter at all.
No electricity, no replacement filter and no chemical needed.
Its not very effective at removing microorganisms but it will get the job done of filtering muicipal water.
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