difference between an Ebb and Flow

[Violets]

Does anyone know the difference between an ebb and flow system, and Hydroponics, ? and which one would be better for indoor growing of African Violets and Poppies, with a 1500 watt metal halide light source

[Ron]

ebb and flow (aka) Flood and Drain is a kind of hydroponics. Just as NFT (nutrient film technique), aeroponics, Drip emitter systems are all forms of hydroponics. Any system where plants are grown without soil could be considered hydroponics.