... Water absorption: 18%-20% 4.environmental eco-friendly,light clay aggregates for HydrocultureArtificial soil/ artificial soil ball/ water ... like Italy, Holland, and North America.1.Material: clay, organic mineral2.Specification: from 2mm to 10mm all available3 ... , arbors, shrubs, roof garden plants, water plants, potted flower plants, aquarium breeding 11. Advantages: lighter than ordinary soils, ...