Lettuce production thoughts.

[sameerraut]

Hi! I am a Botany student and am too interested in DWC Hydroponics. I really like your design. I will really appreciate, if could solve few of my queries.:
What should be the time frame for changing the water in the reservoir for DWC?
How should be the specific design for the reuse of the water (considering your above design)?
What would be best option as per you, I mean to keep the water flowing or to keep it still & changing it later. and in both cases what would be time frame to change the water.
Are there any chances of getting the water contaminated with the Mosquitoes in DWC, if yes, How could we prevent it?
I planning to cultivate 1000 lettuce a week using DWC, so it will be helpful if you could provide me a rough idea about the space that will require and a rough diagram/design about showing how the flow of water will work to preserve as much as water.