I thought about this a bit more. There is one thing I would do differently. Well, maybe I would do no closed loops and would have gone with all tunze streams. Hear me out on this one. I can't stand the looks of the tunzes to save my life. They are big, intrussive, and just plain ugly in the middle of the tank. However, they do move a ton of water for hardly any electricity. What I would do is the following:AquariumObsesse said:What would you change?
On both short ends of the tank (the sides), I would have the tank builder make me false panels with holes in them just big enough to fit the discharge of the tunzes. Those panels would be in very dark acrylic or glass and would be about 1.5" from the bottom of the tank and all the way to the top of the tank. You would not be able to see the tunzes or cables behind them and all you would see is the discharge tips. I would put 5 of the 6200 on each end of the tank and crank them up at 100%. Out of sight, no heat production, no electrical consumption, and good flow. It would be 3-4 times the cost of the close loops, but you would break even at about 2-3 years from the electrical consumption of the close loops. The harder part would be to come up with a way of holding the tunzes in place int he false spaces. They have by far the crappiest of holding systems for their cost and reputation.
If you don't mind looking at the tunzes in your tank, that is the way to go in my opinion.
As far as the humidity, I have had no problems so far. When the AC is on, all year except for 3-5 weeks in winter, the humidity in the house is OK. If it gets too cold outside and we close the windows for more than 3 days, you start to see condensation in the windows big time. Open the windows again for about 15 min. and it is all over. The tank is so far open to the house as the canopy and covering has not been built. When that is finished, I will have 2x 4" fans blowing from above the tank across the wall into the garage. During the day, the garage stays open. At night, it is closed but I leave the doors about 6"-8" from the floor so air can circulate in. I would still like at some point to relocate the chiller to the outside, but that is going to be a task in itself. Maybe later towards the end of the year. I will also place a fan blowing out from the garage, so we can close the doors completely and still turn over the garage's air volume about once every 6 minutes.