I'm interested in switching my system over to an aeroponic setup. It will consist of two 4" diameter pvc tubes with three sites in each tube. Each tube will have only 3 misters and my res size will be a 40L rubbermaid bin. I've got a couple questions First, what type of calculation do I need to do to figure out how much water the system will hold? The water in the res will certainly drop once the pump has been turned on and is running the water through the hoses and into the larger grow chamber. Secondly, with a system of this size what would you recommend my pump size be? This is something I've got no idea how to calculate but know it is crucial to the life of the pump. Too powerful and there will be too much back pressure, hence leading to premature pump failure. Too little pressure and the misters won't perform to their full ability. What kind of temperature increase would I expect to see by using a submersible pump? Finally, what intervals should be used during light cycle, dark cycle, veg state, flowering. I'm not sure if it is a constant throughout the entire grow or there are variations depending on where each plant is in their life. Also, any recommendations on a timer for my pump? It would have to cycle fairly regularly I believe. I greatly appreciate your help. If you don't have the time to answers all my questions feel free to guide me to a link or site that offers such information.