Have read Al B Fuks threads front to back and back to front and havnt found any reference to how high his pots are. He say he floods to 70mm but the 200mm x 175mm pots he talks about are 175mm tall at my local shops, this means there only flooded about the lower 1/3rd? Seems nowhere near 'flooding' to me? Is this typical for flood and drain setups or am i missing something? All the available fllod table I can find at my local shops are 100mm deep so that would correspond to a 70mm flood depth.