Vulca is a pozzolan soil, a natural, honeycombed volcanic rock. Its natural porosity allows water to circulate freely in the soil, promoting bacterial growth and plant rooting.It is particularly appreciated in aquascaping, as it stabilizes the soil under decorations such as rocks or roots. It is ideal for use under gravel so as not to injure bottom-dwelling fish.Capacity: 0.75 KG.Granulometry: 7-15 mm.
