Traditional methods applied for water softening and scale prevention are ion exchange and reserve osmosis. Both methods remove just excess hardness salts from water. These are reliable but rather expensive methods.

An alternative way to prevent scale formation is to leave hardness salts in water, but to change their structure so that they will not form hard deposits when heated. Scale usually consists of calcium carbonate in the calcite form. However, there is another crystalline modification of calcium carbonate — aragonite. Aggregation and surface adherency capability of aragonite crystals are substantially lower than those of calcite. Aragonite precipitates in the fragile and loose form.

Up to now, magnetic water treatment was the only method using this property of aragonite for scale removal. Treatment of hard water with a Geyser Aragon filter in various geographical regions always revealed the same effect. Even when ion-exchange capacity of filter is exhausted, the water passed through Geyser filter does not form scale and, moreover, washes away the old one.

Surface of heating element after 6 month operation in hard water:

    Without Filter With Geyser Filter


Observed phenomenon, was called “quasi-softening”.

Formation of aragonite structure of hardness salts as a result of water flow through Geyser Aragon filter was confirmed on experimental grounds. Changes in crystalline structure of precipitate and rhombic aragonite crystals are clearly seen through the microscope.  

Crystalline structure of precipitate:

Common hard water Water treated be Geyser filter

The results of X-ray analysis carried out by National Institute of Mineral Raw Materials of Russian Academy of Sciences, also state that the content of aragonite form of calcium carbonate in water substantially increases after filtration through Aragon.

Common hard water

5% aragonite / 95% calcite (spectrum No. 1)

Geyser filtered water

40% aragonite / 60% calcite (spectrum No. 2)


Collaborative studies with Vienna University performed on hard water in Austria and Germany, confirmed the “quasi-softening” effect with accumulation of aragonite and allowed describing the mechanism of this phenomenon.

Let us consider transformations of hardness salts during filtration. Hardness salts exist in aqueous solutions in the form of metastable compositions, called clusters. Aragon material has a porous structure formed by a number of tortuous channels. Constantly increasing pressure resulted from narrowing of the channel produced by cluster passing through the material shifts the chemical equilibrium towards the dissolution of carbon dioxide, which is always present in water.

Chemical activity of ARAGON polymer in combination with its advanced porous structure creates conditions for recrystallization of clusters from calcite into aragonite. On leaving the filtering element, the pressure initially increases to the maximum value with the following sharp decrease. The carbon dioxide is exhaled and it quickly escapes from the water. A similar gas escaping effect is observed when we open a bottle of carbonated drink. The liberation of carbon dioxide slightly increases the pH of water, shifting the equilibrium towards carbonate formation. As the result the solution is supersaturated over calcium carbonates and aragonite nuclei are formed. The aragonite solubility decreases with further heating. Aragonite is known to be less supersaturation-resistant than calcite. Aragonite very rapidly precipitates in the bulk of the solution rather than deposit on the surface, which is of practical importance.

The filtration process of aragonite changes the physical structure of hardness salts into aragonite form without noticeable change in the mineral composition of water.

The “quasi-softening” effect is achieved without any additional equipment being a unique property of filtering material. Considering the fact that aragonite water does not form scale and graduallydissolves old deposits one can suggest that similar effect of such water can be observed on living organism, dissolving nephroliths (kidney stones). The influence of water filtered through Aragon material on living organisms was studied at the Military Medical Academy (St.Petersburg). Two blind experiments were conducted on two groups of white rats within the period of 30 days. Animals of the first group were receiving hard tap water, while animals of the second group were receiving the same water but filtered through the Aragon material. Prior to giving the water to the rats of the 2nd group, the filter was operated in hard water for a long time. As the result it was saturated with calcium and magnesium salts and the hardness value of initial and filtered water was almost equal. This allowed factor of chemical change of water composition to be excluded, retracing the influence on rats of “quasi-softening” effect only. The most significant differences between animals of different groups were obtained based on the analysis of urine deposits (see fig). Urine of animals of the first group contains large crystals capable of forming nephroliths. Moving, these crystals inflict mechanical damage on internal tissues of kidneys and urinary tracts. This hypotheses is confirmed by the presence of proteins and blood in the urine. These micro injuries can contribute to the development of internal infections.

It is safe to say that consumption of the Geyser filtered hard water leads to the decrease of both the size and the number of crystals in urine that provoke stone formation. Such a positive change in the urine composition is possible as the response to increased calcium inflow and calcium is better assimilated by organism being a part of Aragonite.

Aragonite form of hardness salts facilitates calcium assimilability, improves functions of gastrointestinal tract and liver, decreases kidneys loading, and reduces the chances of nephrolith formation.

Water treated with the Geyser filter with Aragon material can be used as a non-medicated prevention of urolithiasis.