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User Manual
Step 3. Add Nutrition and Test the Water
1. After adding water, put the Pump in AUTO mode.
• During the operation of the pump, the tank water level begins to decrease, after every layer of
planting tube has filled with water. Pump stops after 10 minutes in AUTO mode.
• Each layer of planting water will slowly drain. In order to let plant roots breathe, each layer of
water will flow back to the tank. This is called the ebb-and-flow method.
• At this point the tank water level will rise again.
• Do not add water until the pump has stopped for 15 minutes.
• After 30 minutes, confirm that the water of each planting tube has returned to the tank, and
keep the water up to the Red Line.
2. Add Nutrients (1 Starter Cup) to the water tank.
• After the pump runs for 30 minutes, the nutrients will be mixed up well and ready for test.
• Test EC and pH level.
• Make adjustments to the nutrition and pH level. Refer to pages 28-29 for recommend amounts.
• Ensure EC between 1000-2000μS/cm(=1.0-2.0 ms/cm).
• Ensure pH between 5.5-6.5.
To maintain good conditions for plant growth, be sure to check the pH as well as EC (Electrical
Conductivity) weekly! (Refer to pages 28-29). And always maitain the water above the red line.
GrowWall
P20
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