Velda Premium bottom substrate This bag of Premium bottom substrate from Velda is perfect for your pond. This biological substrate is very porous, so it has a good bacteria adhesion. This makes the substrate for example ideal for the bottom of your pond or bank. In addition, it can also be used perfectly when potting or filtering. So this multifunctional bottom substrate from Velda is...

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White Substrate ensures optimal development of the pond environment through an open structure and a large internal surface area. This guarantees maximum growth of microorganisms. This product contains all necessary minerals and trace elements.