1. DWC hydroponic system artificially creates a favourable root environment, avoids unwanted elements of soil manipulation and meets the plant's need for water, nutrients and growing conditions. 2. Hydroponic system, no natural soil is used as a substrate and after planting it is watered with a nutrient solution to meet the needs of the growing environment for water, nutrients and minerals. 3. The raw materials used for cultivation can be reused. Therefore, soilless cultivation has the advantages of being watersaving, laboursaving and highyielding, and is increasingly used in horticulture and agriculture. 4. Box contents: 6 x round buckets (20 litres), 1 x water change bucket (20 litres), 1 x adjustable water pump with large air volume, 1 x 6 m ceramic air hose, 6 x air stone, 6 x check valve, 1 x water level indicator, 7 x valve connection, 1 x instruction manual.