The system did not have an electric water-cooling mechanism and in summer months the water temperature would increase above 22 °C. To mitigate excessive temperature increases, in summer months a 50% shade cloth (Aluminet, Maryland Plants and Supplies, Inc.) was installed above the hoophouse, a reflective plastic tarp was hung 1.5 m above the fish tanks, and a thermostat-controlled 4-ft greenhouse fan was used to pull air through two sets of louvered windows. Additional cooling was achieved by rolling up the sides of the hoophouse to 1 m in height. In the event of a power outage, backup power was supplied by a propane-driven generator.