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Part C. Systems and media

1. 20Anatomy of a hydroponic system: the design parameters Level 1 Name root-zone functions; classify any system by water, air, support and flow
2. 21Kratky and other passive systems Level 1 Explain the air-gap principle, limits, suited crops
3. 22Deep water culture Level 1 Explain DWC, aeration, sizing, risks
4. 23Nutrient film technique Level 2 Explain film depth, slope, flow, channel-length limits, with real numbers
5. 24Ebb and flow (coming) Level 2 Explain flood cycles, media choice, timing
6. 25Drip irrigation and substrate culture (slabs, Dutch buckets) Level 2 Explain drain-to-waste vs recirculating, irrigation scheduling, leaching fraction
7. 26Aeroponics and fogponics (coming) Level 3 Explain droplet size, pressure, failure modes
8. 27Growing media I: air, water and particle size Level 2 Read a water-retention curve; explain container capacity, air-filled porosity, perched water
9. 28Growing media II: pH, CEC, buffering and microbes (coming) Level 2 Explain CEC, coir buffering, rockwool pH, biofilms
10. 29Choosing a medium: rockwool, coir, perlite, LECA, peat and others Level 1 Compare media on measured properties and cost; pick one per system