GpsFrontier, that is just an amazing idea.
I might have to check out the local Lowes and see if they have all the materials needed if I can't find a used cooler or 1 that someone has thrown out in the next week or 2. I now have to add between 2 -3 gallons of water to my reservoir per day as the plants are really starting to take off. At this rate I will have to refill the reservoir daily in another month so it's either build or find.