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Passive System: Capillary action transfers the nutrient solution from the reservoir to the growing medium. Wick systems have no moving parts, seldom does anything break down or malfunction. Because the nutrient solution only moves one way, up and out of the reservoir into the growing medium your ph and food strengths will not fluctuate. No nutrient solution is drained off; it is all absorbed by the plants, this means you never have to change your nutrient solution only add your desired amount.
Your plants will feed on demand, never allowing over or under feeding.
The trays were not drilled with drain holes on purpose, so that you can decide if and where you want them. Some people with only one or two prefer to wet vacuum them out when they want to drain the nutrient solution or to leach.
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