1. First of all, we need a water tank to store the nutrient solution. This water tank should be large enough (the water tank in the figure below is 100 gallon, about 378 L) to ensure that the nutrient solution can be stored for a certain period of time for the use of plants. At the same time, the balance of nutrition and acid-base can be ensured when adjusting the pH and EC. It is recommended that opaque and UV stabilized plastic tanks be used to prevent algae or other microorganisms from spreading in the nutrient solution.
2. To build the skeleton, it is recommended to use stable and rust resistant materials. The length of planting trough should not exceed 4.5m. There should be a slope difference between the head and tail of the planting trough, generally 2% - 3%. The planting trough shown in the figure below is 3 meters long, the tail is about 5 cm lower than the head, and the slope is 1.67%.
3. A small hole should be designed at the head of each planting trough for nutrient solution to flow in.
4. A large hole should be designed at the tail of each planting trough for nutrient solution to flow out and circulate to the water tank.
5. The water inlet pipe is designed under the framework, and an outlet pipe is designed to connect the planting trough at the interval of each planting trough.
6. The return liquid is directly led to the water tank through transparent plastic pipe.
7. A water pump is placed at the bottom of the water tank near the head, and the water pumped directly flows into the liquid inlet pipe bound under the framework.
8. What we need next is plant nutrient solution and acid-base adjusting solution.
