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To produce pure water gets more and more important with increasing concentrations of harmful substances in the tap water. Many aquarists have to produce pure water with reverse osmosis units. The advantages of this technique: simple to handle, high rejections of substances, no chemical compounds, automatically operation possible.
But in some areas tap water contains high concentrations of silica and nitrate. Silica is used to take care the tap water system of corrosion. Sometimes you can measure more than 20 mg/l (ppm) silica in tap water. Nitrate is a problem caused by the agricultural industry. In German tap water 50 mg/l is the maximum concentration - in the European Community 25 mg/l.
If the tap water contains more than 50 mg/l nitrate of more than 1 mg/l silica the best low pressure reverse osmosis unit is not able to reduce these substances below a harmless concentration for marine aquariums. Good units reduce nitrate and silica only to 80-90%.
If you use water with nitrate and especially silica a massive population of algae (green, blue green and diatoms) can grow. Most times you can see them as a greasy dark brown and green film that grows over stones, sand and animals. If these films get to thick they can kill bentic animals like corals. Additionally these films looks not good.
The AquaCare Ultra Pure Water Filter contains a resin that changes positive ions (cations) with H+ and negative ions with OH-. The changed H+ and OH- combine to neutral water H2O. The result is water of over 99,9% quality without salts like silica and nitrate. The ultra pure water is of best quality for fresh and sea water, tropical plants and technical purpose.
The AquaCare Ultra Pure Water Filter is easy to install. You have to mount it simply after a reverse osmosis unit. If the reverse osmosis unit runs the filter produces ultra pure water without harmful substances.
Dependence of the electrical conductivity of the water passes through an AquaCare Ultra Pure Water Filter:
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This filter does not belong in the hands of small children - danger of swallowing small parts!