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āĻŽā§āϞ āϤāĻĨā§āϝ
- No pumps, electricity, or timers required
- Air gap forms naturally as plants drink the nutrient solution
- Lowest cost and simplest setup of any hydroponic method
- Best for leafy greens, herbs, and short-cycle crops
- Reservoir is filled once and topped up as needed â minimal maintenance
- Developed by B.A. Kratky at the University of Hawaii