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Old 04-28-2007, 12:09 PM   #1
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Tank too hot...will not cool...

I have a 65 gal salt tank that I have serviced every two weeks by an aquarium service company. They have been working on my tank for about 6 months. My thermometer, before they started on my tank appears to have not been working correctly. We now have a digital thermometer so we can monitor it better. The tank runs from about 81 to about 83-83.5. We have taken out all of the powerheads so the only things running in the tank are the pumps in the sump. The UV sterilizer is off and so is the heater. The main pump is a Magdrive 700.

The service company says that they don't know why it won't cool and that my only real option is a chiller. They suggested a fan in the cabinet over the sump, but I don't think there is enough water surface area under there that would make a difference.

What do you guys think is the reason it won't cool and the best way to get it to cool?
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Old 04-28-2007, 12:27 PM   #2
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What kind of lighting do you have? do you have a top on the tank? I have a lot more equipment running in my tank and I have 570watts of light and my tank isn't that hot....
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Old 04-28-2007, 12:35 PM   #3
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I use a floor fan that is on a timer, with my lights. My temp was 82 and now it stays around 78ish.
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Old 04-28-2007, 01:41 PM   #4
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A fan is a good place to start. If that doesnt do the trick, you can always look into a chiller. Personally, a fan is quieter, less expensive and uses a lot less energy. Try it out.
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Old 04-28-2007, 04:06 PM   #5
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It is an acrylic tank and it is closed on the top. There are two panels that can come off for ffeding etc., but I keep them on. The tow panesl cover abot 50% of the top of the tank. The light is a coralife with 2 Actinic 65w and 2 10,000k 65w and it sits on stands on top of the tank.

Do you really think a fan over the sump would do anything? The biggest fan I could fit would probably be about 4 inches and its not really hot down there.
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Old 04-28-2007, 05:42 PM   #6
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IMO, if your tanks stays stable at 83 ish, then you are fine. I have kept mine in that temp range for years with no troubles. The problem comes in if you have severe cooling after lights out, in which case, setting the heater at 82 will prevent the nighttime cooling. My advice is to quit fighting the tanks normal equilibrium.
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Old 04-28-2007, 10:29 PM   #7
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Quote:
Originally Posted by Hara
IMO, if your tanks stays stable at 83 ish, then you are fine. I have kept mine in that temp range for years with no troubles. The problem comes in if you have severe cooling after lights out, in which case, setting the heater at 82 will prevent the nighttime cooling. My advice is to quit fighting the tanks normal equilibrium.
I would be fine with that but few things live longer than 2 weeks in my tank and I'm being told that it is because of the heat.
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Old 04-29-2007, 12:06 AM   #8
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If that is the hottest your tank is getting, things are not dieing because of the temperature and you need to start looking for other causes.
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Old 04-29-2007, 12:58 AM   #9
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The only fish to have made it through is a clown (we've had him for about a year and a half) and he's not that big. He can't be killing everyone else, can he?
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Old 04-29-2007, 02:15 AM   #10
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What is the lowest temperature your tank is getting to after "lights out?" As mentioned, a temp swing will affect it. You dont want more than 2 degrees of variance in a 24 hour period.
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