Quick Answer
Aquaponics can be used for growing specialty greens like arugula, but it requires careful management of water chemistry and nutrient levels, as greens have specific requirements.
Choosing the Right Aquaponics System for Specialty Greens
When growing arugula and other greens in an aquaponics system, a NFT (Nutrient Film Technique) or raft system is often ideal. These systems allow for high water flow and oxygenation, which greens require for healthy growth. For a small off-grid setup, consider a 4-6 ft long NFT channel with 4-6 inches of netting spacing, which can hold up to 20-30 plants.
Managing Water Chemistry for Greens
Arugula and other greens are sensitive to water pH and nutrient levels. The ideal pH range for greens is between 6.5 and 7.5, while nutrient levels should be carefully managed to avoid over-fertilization. Regular water testing and adjustments can help maintain optimal conditions. For example, add 1-2 teaspoons of pH adjusters per 100 gallons of water to maintain the desired pH range.
Tips for Growing Arugula in Aquaponics
To promote healthy growth and prevent bolting, arugula should be harvested at the right time. For aquaponics, consider harvesting arugula when the leaves reach 4-6 inches in length. This will also help maintain plant density and prevent overcrowding. Additionally, consider using a fish load of 1-2 pounds of fish per 10 gallons of water to maintain a balanced aquaponics system.
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