Healthy water qualities or how much the water should be filtered ?
.1. MICROBIOLOGICALLY PURE WATER - on  long term decreases the natural capacity of the body to adapt itself to microbiological changes of the environment. In other words it decreases the strength of the immune system.
.2. PURE WATER - or water with no impurities lowers the daily intake of daily necessary minerals (Ferum, Magnesium, Calcium, Zinc, Iodine, Chlorine, Fluorine, etc) - absolutely all of these elements are vital for human health. 
.3. GIARDIA LAMBLIA (and other parasites of this kind). Classification of symtoms associated with Giardia infection are very unclear and unprecise because many of these symptoms may be caused by tens of other causes which have nothing in common with Giardia Lamblia itself. THE MICROBIOLOGICAL RISC IS MUCH GREATER WHEN YOU EAT WITHOUT WASHING YOUR HANDS.
.4. WE DON'T RECOMMEND drinking too much water which has a mineralization more than 1,5 gram/litre.
.5.  IN MOST URBAN AREAS  water mineralization is less than 1 gram/litre.
.6. THE MOST IMPORTANT thing which lacks in tap water is living energy (information, structure and energy). If the water is filtered it does not mean that it's energetically better.   
.7. A HEALTHY WATER is a water which has: (a) mineralization ~ 0,3-1,2 gram/litre (b) has neutral informational-vibrational energy   (c) has a crystal which resembles the snowflake (d) has structure (e) has energy
.8. IN CASE OF EPIDEMIOLOGIC RISK water should be boiled

water therapy