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Old 06-27-2006, 04:45 PM   #1 (permalink)
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Default Chiller with heater temperature control

I have a 65-gallon planted tank that I keep at 85F for the discus I'm going to get. My heaters and other equipment are in the sump. As I've found that in the summer, the temperature rises to 90F, I've decided to get a chiller.

The chiller doesn't have a separate connector in the back for my heater as some do. I'm worried that if I simply set the chiller temperature and the heater temperature separately for 85F, both will be on at the same time and run continuously. I was trying to avoid getting a separate dual-stage temperature controller since they seem to run $100+.

Does anyone have any experience with running a chiller and heater on their own thermostats? Of course, one solution is to set the chiller set temp higher than the heater one, but then, I may run into frequent temperature oscillations of several degrees over the course of the day. I'd appreciate any input.
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Old 06-27-2006, 06:24 PM   #2 (permalink)
 
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The first thing you need to find out is why is your tank getting so hot? Is your house air conditioned? Is your lighting raising the temp that much? Have you tried adding a fan to blow across the water? It will increase your evaporation and need for top offs but you can buy a LOT of water for the price of a chiller.
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Old 06-28-2006, 08:08 AM   #3 (permalink)
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I've already determined that I need a chiller because I live in a NYC apartment and the room with the aquarium is not air-conditioned (nor can it be). I'm also getting the chiller for a ridiculusly good price since a friend is moving and practically giving it away.
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Old 06-28-2006, 08:27 AM   #4 (permalink)
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Can you set the heaters to ~84 and your chiller to ~86?

You should be able to dial in one or the other quite well so that there is at most a 2 degree swing with minimal equipment fighting.
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