The Ebb and Flow Hydroponics System for Organic Gardening

System Layout

• Upper grow bed: Tray/box with individual plant containers. Media: rockwool, coconut fiber, lava rock, perlite, vermiculite, styrofoam pellets. Lava rock excels at water retention.
• Lower reservoir: Water + dissolved nutrients. Aquarium pump on timer floods grow bed, then drains back.

Nutrient Management Challenges

Beginners struggle with pH, nutrient concentration, and ratios. Organic nutrients decompose in water, dirtying reservoirs. Synthetic concentrates stay clean but burn roots if overused.

Monitoring Is Mandatory

Solution composition changes with each cycle — nutrients deplete, ppm shifts. Regularly test pH and nutrient levels. Precision prevents deficiency or toxicity.

Organic Adaptation

Use dual-root containers: organic upper medium for soil-based feeding, inert lower medium for capillary water. This separates nutrient zones and simplifies organic management.