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Quality Water Filters 4 You Posting Page
Tuesday, February 19, 2013
Water filters produce many undoubted benefits, freeing us from pollutants ranging from the unpleasant (silt that makes water taste or smell funny) to the dangerous (heavy metals or insecticide residues). Yet, one might also ask, is it possible to filter water too much – can there be too much of a good thing? The answer appears to be yes, though only in exceptional circumstances, and there are already water filters in existence designed to address the problem.
   
Most household water filters do not filter your water “too much” – even powerful filters like Berkey or Aquacera models leave all the necessary minerals in the water. It is only reverse osmosis systems, which force water through a membrane offering an astonishingly tiny pore size, that take minerals out of the water and leave it essentially empty and distilled.
   
Reverse osmosis filters are the ultimate in home water purification – they literally leave nothing but water in the water, as one might say. Every molecule of natural minerals, every virus, every bacterium, and every particle of dissolved metal salts is purged utterly from the fluid passed through one of these membranes.
   
Reverse osmosis filters definitely have their place. They are excellent for areas where the water is heavily contaminated, and are among the only filters that can remove the smallest virus particles and fully cleanse water of high arsenic levels. However, their use should be carefully considered because they also empty water of its natural mineral content.

Demineralized water

Putting water through a good reverse osmosis filter produces demineralized water – which is essentially the same as distilled water. Calcium, magnesium, and potassium are found in literally every water supply on Earth, and every water supply that has ever existed on Earth, for that matter. Our bodies are adapted to absorbing these trace amounts of minerals steadily, on a daily basis, over the course of our whole lives.
   
Drinking demineralized water is not directly dangerous to your health – it will still rehydrate you, and will cause no damage or adverse reactions in the human system. It is simply lacking – and drinking nothing but demineralized water will eventually cause mineral deficiencies. These, in turn, may cause damage to the teeth and bones as the body removes minerals from them to supply what it is no longer getting through water.
   
Again, this is a long-term problem – drinking demineralized water occasionally, or even for a few weeks (for example, during a water-contaminating emergency such as a hurricane's aftermath), will not do any damage. However, standard carbon block filters are probably better than reverse osmosis filters in most cases simply because they provide full protection in most situations while leaving potassium, calcium, and magnesium in the water.

The modern solution – ‘remineralizing’ filters

For those who need or want the powerful filtering offered by a reverse osmosis filter, a novel solution has been devised and is now being marketed in an affordable form by several water filter companies. These filters strip the water clean, and then remineralize it with the proper, healthy amounts of calcium, magnesium, and potassium found in drinking water. This is an interesting solution to a potential problem and offers you the best of both worlds – full filtration with reverse osmosis without the long-term problems of demineralized water.


by: Chris Tracey

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