I'm in in the southern US (USDA Plant Hardiness Zone 8a). I'm thinking of putting an Aquaponic system in a Walipini. Maybe 15ft x 20ft? I expect that in the winter it should do fine, but I'm concerned about it overheating in the summer. I'm wondering if an exhaust vent & shade cloth will do enough to keep cool enough. Does anyone have any experience with this type of situation? Thanks.