Crystals food grade polyphosphate . ,have the function of keeping calcareous suspended water molecules to avoid buildup. ,is a long-term filter bed . ,replenished when they wear glasses as water flows . ,packing of 25 kg .
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Crystals food grade polyphosphate . ,have the function of keeping calcareous suspended water molecules to avoid buildup. ,is a long-term filter bed . ,replenished when they wear glasses as water flows .