Treatment of water, especially water for aquaria
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United States of America Patent
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May 17, 1983
Issued Date -
N/A
app pub date -
Oct 6, 1980
filing date -
May 5, 1978
priority date (Note) -
Expired
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Abstract
Treatment of water for selective and quantitative removal of all cations of the transition elements, with simultaneous adjustment of a definite mole ratio of calcium, magnesium, and the alkali metals, with a cation exchanger which, towards the ions of the I. transition elements, II. alkaline earth metals, III. alkali metals, shows a markedly gradually decreasing affinity from I. to III.; and which cation exchanger is loaded with calcium and magnesium ions in a predetermined mole ratio, or with hydrogen or sodium ions to obtain a water corresponding to the desired type of water in a vessel made of a water-resistant material and having at least one water-permeable wall.
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