some pics of the aquaponic setup. loosely modeled after UVI aquaponic system.
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pulley system makes adjusting the boom from which the 2 reflectors are hanging a cinch to move:
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this solid state fan speed controller is the BOMB! it's not a stepper (HI-MED-LO). you can actually dial it into any speed you want with no hum, no vibration, no heat. i have my air cooled reflectors on one and the room exhaust on another, both 6" ~400cfm fans. makes regulating temperature a breeze as long as outside temp isn't too far out of range.
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