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Product Description
SunSun GP-04 Coral Sand Aquarium External Filter 500ml * 2 Boxes
Coarse coral sandis well suited as a hardness buffering filter medium and is used both in pond and aquarium filters, as well as in lime reactors as a filling material.
The large internal surface with capillary action in coral sand makes that this filter medium is considered one of the best and most efficient biofilter materials for medium-sized and large pond filter systems. The growing buffer effect provides additionally the stability of the water equivalent.
Coral sand consists of pure calcium carbonate with all natural microelements.