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Old 05-23-2010, 09:46 PM   #1
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Chiller Question

Hey all,

After a good 2 months, I finally got my marine aquarium up and running and wanted to know about chillers. My aquarium is running very warm and I'm concerned about the summer months. Can anyone recommend a good chiller unit that either runs inline with my pump or can attach to my sump? I have a 90 gallon system.

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Old 05-23-2010, 10:46 PM   #2
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How warm is "very warm?" Often people think they need chillers when they actually don't. Even adding a clip on fan that blows across the water can lower the water temp. a few degrees.
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Old 05-24-2010, 12:19 AM   #3
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what is your water temp if it is 84 and below you are fine
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Old 05-24-2010, 12:36 AM   #4
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I agree with thom on this one. Instead of spending big bucks on a chiller, see if there are other ways to chill your tank that are low-cost, and effective. The most common way is the fan blowing across the top of your tank. That can definitely lower the temp by a few degrees. Depending on the surroundings of course..

As already asked, how hot is your tank water normally?
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Old 05-24-2010, 01:37 AM   #5
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Thanks for all the help! The system has an old (and I believe) out of commission chiller with a themostat that reads 80-81. So I'm below the critical threshold of 84, but am concerned about the upcoming summer. How about putting a fan in to blow the sump system? The top of the tank isn't really amenable for me to open the top to blow directly on the water (too much splashing from the water inlet from the sump.

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Old 05-24-2010, 01:44 AM   #6
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Buy yourself an ice chest, fill it with water and wrap your tubes tightly in foil then coil them in a loop like you would do your garden hose and just put it in the water. That might cool it another degree or two.
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Old 05-24-2010, 02:42 AM   #7
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Crepe.. the only problem with that is that may cool the tank down too quickly. You really don't want quick changes because livestock need to be acclimated to new levels. Too much and too quick of anything could shock the tank, and could damage things. Also.. 84 degrees really isn't THAT critical.. but it is a little warm for most tropical livestock. I mean.. if your temps were reaching something like 86 to 88.. then i would definitely say use a fan or a chiller.

I think a fan over the sump would work too.. but i'm not entirely sure on that one. Might want to hear from others and then make an informed decision.
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Old 05-24-2010, 02:59 AM   #8
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You're correct, I was assuming that he would only use it on the hottest of days to save his livestock. You wouldn't of course, add ice to the water, just plain out-of- the-faucet water should be about 3 degrees cooler than ambient temperature. My thoughts were that it would be similar in design to a computer liquid heatsink, only larger.

I use a fan on my FW tank to cool it. It's only 20gal but it cools it a degree or two.
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Old 05-24-2010, 04:18 AM   #9
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I have emergency bottles of ice in the freezer at all times. It slowly lowers the temp of the tank. Peace of mind if you can't afford, or don't have enought room for a chiller.
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Old 05-24-2010, 04:55 AM   #10
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You didn't say what you had in your tank?
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