Here are some photos of my setup:
Water tank of the evap. cooler.
There is a float valve attached, orange ball.
Two pumps inside.
Black pipe runs water to the evap cooler.
White pipe is the return from the evap. cooler.
Blue pipes are used to circulate cold water through the coil, which is inserted in the
nutrient solution tank.
The fans, NFT channels and a small raft system for the seedlings.
The evap. cooler.
Black pipe runs water from the cooler tank.
White pipe below returns excess water to the cooler tank.
Nutrient solution cooling setup.
Blue pipes are used to circulate cold water through the coil, which is inserted in the nutrient solution tank.
A thermostate is used to stop the
pump when NS colls down to 25 degrees celcius.