I plan to build an outdoor aero system to grow mostly tomatoes and maybe lettuce. I will be using 2 square PVC fencing posts about 6ft long and sealed on both ends. I will drill some holes to fit in 3 inch net pots. I will run 1/2 inch piping through the inside of the fencing posts. I will have sprayers attached to the 1/2 inch piping. The water will drain back into the reservoir using piping.
The only problem I will run into is how can I keep the water temps down on those steaming hot days of summer? I was going to buy a large cooler to work as my reservoir as it should keep the water cool as long as I put in 2-3 bottles of frozen water. Hell when I go to the beach my small cooler will usually keep everything cold as long as it has ice so why wouldn't it work for this? Will a cooler work or should I just go with a rubbermaid tub and if so how can I keep the water temps down?