| 摘要 |
Filtration device for sea water, usable in particular to obtain a biological equilibrium in an aquarium, comprising a cartridge (10) through which the sea water passes, said cartridge (10) being filled with granules whose properties enable the pH of the water to be kept at a predetermined alkaline value such as 8.3, at which value the nitrites present in the water are no longer toxic. The granules are in the form of particles having a closely honeycombed structure, whose greatest dimension does not exceed 0.5 cm. <IMAGE>
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