That looks like a very nice setup Homer. I'm curious, how constant does it keep the RH in the tanks? Do you get spikes when it turns on and off? Does it only run at night? Have you tried running it durring the day? How much of a temp drop do you get? How effective might it be in cooling at night? I guess it may be a little soon to have any real data on some of this. I would be very interested in the hard numbers from what you have set up here.