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Old 05-05-2011, 12:28 AM   #1
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temperature 84.4 degrees

as the title says 84.4 degrees...is this way over the limit for of a reef tank? Whats a safe maximum safe limit?

Thanks
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Old 05-05-2011, 12:36 AM   #2
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82 tops. Preferably slightly under 80 for most things. But yea, coral bleaching all over happens when temp remains above ideal for extended periods of time. If it stays that hot with heater off, run some fans over the surface of the water and against the sides. Unless you see the need to go for a chiller.

Keep in mind fans will increase evaporation rates. My tank is sitting at 78 degrees and seems off too a good start.
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Old 05-05-2011, 12:51 AM   #3
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That's the thing i don't have room for a chiller... Well it doesn't sit at that temperature 24 hours... just hot days in the evenings... over night temp does drop and in mornings and afternoons it sits lower...
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Old 05-05-2011, 01:12 AM   #4
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I've heard of people using sealed ice bags when they expect the day to get hot. You can also turn your ac down a bit
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Old 05-05-2011, 01:18 AM   #5
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yea if I had an AC lol... I guess my next question is will 84.4 be ok if its only certain days and times... Or is that a definately no..
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Old 05-05-2011, 01:19 AM   #6
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Yea I have heard of frozen bottles too maybe ill try it
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Old 05-05-2011, 01:26 AM   #7
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It's best to keep a constant temperature, not changing more than a degree in 24 hour span. You can lose a lot of livestock if there are a lot of changes. My tank seems to do best around 74-76 degree range.
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Old 05-05-2011, 01:35 AM   #8
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like scarcothelia said, coral bleaching starts to happen above 82. IMO, I wouldn't risk it and just add frozen water bottles on hot days. What is your tank size? Don't add like a 1L bottle to a 20g xD
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Old 05-05-2011, 01:38 AM   #9
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I have a 60 gallon with a 20 gallon sump
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Old 05-05-2011, 01:41 AM   #10
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As someone earlier mentioned, get a clip-on fan and have it blow it across the top of your tank. Put it on a timer so it's only on during the part of the day when it gets the hottest. You can easily drop the water temperature by 2 degrees with just that single fan.

I'd make 82 your top limit. I wouldn't want to go over that on a daily basis.

What are your heaters set at?

[Edit: After seeing you have a sump, better yet... have two fans - one blowing across the tank and the other across the sump.]
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