Kratky

  • Best Hydroponic Systems for Lettuce: NFT vs DWC vs Kratky

    ByFaisal Habib

    Home » Hydroponics » Best Hydroponic Systems for Lettuce: NFT vs DWC vs Kratky Last Updated: August 08, 2026 | Reviewed for accuracy, clarity, and safety Quick Answer: The choice between active recirculating systems and passive tanks involves trade-offs between labor efficiency and risk management. NFT systems allow automated commercial channel flushing and dense gutter spacing, maximizing plants per square foot. However, because roots reside in a shallow 1–2 mm water film, pump failures cause complete crop desiccation within 2 hours. DWC systems hold hundreds of gallons of nutrient water, protecting crops against power outages for days. ⏱️ Time: 30 Minutes 💪 Difficulty: Beginner 💰 Est. Cost: $50 – $150…

  • Kratky Method for Hydroponic Lettuce (No Pump, No Electricity)

    ByFaisal Habib

    Home » Hydroponics » Kratky Method for Hydroponic Lettuce (No Pump, No Electricity) Last Updated: August 08, 2026 | Reviewed for accuracy, clarity, and safety Quick Answer: In traditional active hydroponic systems (like DWC or NFT), water pumps or air stones continuously dissolve oxygen into the water. In the Kratky method, oxygen transfer occurs passively within the enclosed air gap. Relative humidity inside the sealed reservoir remains above 95%, preventing air roots from drying out while maintaining an aerobic environment that suppresses anaerobic pathogen proliferation. ⏱️ Time: 30 Minutes 💪 Difficulty: Beginner 💰 Est. Cost: $50 – $150 💡 Key Term The Kratky method for hydroponic lettuce is a non-electric…