Vincia Maërl Crystal is a 100% natural product with a very low phosphate content. It is ideal for creating new ponds and for clarifying cloudy water. This product increases the overall hardness of the pond water and activates the development of micro-organisms. It is very easy to use: Simply sprinkle the grains into the pond. Thanks to Vincia’s natural products, your pond will remain free of algae and the water quality will be improved in a natural way. These products are 100% environmentally friendly and biodegradable.Vincia is the perfect choice for pond lovers who do not want to use unnatural products, but still want to enjoy life around a clear water area. Optimize your pond with Vincia Maërl Crystal and experience a clear and healthy water section! Free of algae and promote water quality in a natural way. They are 100% environmentally friendly and biodegradable. Vincia is for the pond lover who prefers not to use unnatural products but wants to enjoy life around clear water.