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Made of natural quartzite through high temperature heating, containing calcium oxide, magnesium, potassium, sodium High-permeability and poriferous structure creates an ideal environment for bacteria proliferation Suitable for fresh water and saltwater, and it is recommended to apply with other bio filtering materials MINI QUARTZITE GLASS High deusity porosity structure, with 1010m2 surface area per unit, making it optimal for nitrobacteria colonization and growth and resulting in the best purifying effect.
