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SnowManSnow

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So what is the highest temprature your reef hits during the day?

Most days mine hits a full 82 before the lights go off :( Gotta work on that.

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Anonymous

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82's not really a problem. In fact, I deliberately ran a tank at 81 for years. These days I let it run a little cooler.... 80 :D
 

SnowManSnow

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I can keep it 1 or 2 degrees cooler with a fan running, but I really just don't have the room in my sump for it...although my corals don't seem to be as happy at a warmer temp as they do around 78 or 77... higher temps seem to aid in algae growth as well.

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Anonymous

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Higher temps = faster metabolism = faster growth rates. Of corals AND algae.

If you're really interested in the subject you might try digging around to see if anyone archived the old Bob Mankin vs Ron Shimek temperature debates that raged about 10 years ago. Barring that, though, for a quick summary I think Randy Holmes-Farley sums the whole thing up quite well when he wrote,

"Temperature impacts reef aquarium inhabitants in a variety of ways. First and foremost, the animals' metabolic rates rise as temperature rises. They may consequently use more oxygen, carbon dioxide, nutrients, calcium and alkalinity at higher temperatures. This higher metabolic rate can also increase both their growth rate and waste production at higher temperatures.

Another important impact of temperature is on the chemical aspects of the aquarium. The solubility of dissolved gases such as oxygen and carbon dioxide, for example, changes with temperature. Oxygen, in particular, can be a concern because it is less soluble at higher temperature.

So what does this imply for aquarists?

In most instances, trying to match the natural environment in a reef aquarium is a worthy goal. Temperature may, however, be a parameter that requires accounting for the practical considerations of a small closed system. Looking to the ocean as a guide for setting temperatures in reef aquaria may present complications, because corals grow in such a wide range of temperatures. Nevertheless, Ron Shimek has shown in a previous article that the greatest variety of corals are found in water whose average temperature is about 83-86° F.

Reef aquaria do, however, have limitations that may make their optimal temperature somewhat lower. During normal functioning of a reef aquarium, the oxygen level and the metabolic rate of the aquarium inhabitants are not often important issues. During a crisis such as a power failure, however, the dissolved oxygen can be rapidly used up. Lower temperatures not only allow a higher oxygen level before an emergency, but will also slow the consumption of that oxygen by slowing the metabolism of the aquarium's inhabitants. The production of ammonia as organisms begin to die may also be slower at lower temperatures. For reasons such as this, one may choose to strike a practical balance between temperatures that are too high (even if corals normally thrive in the ocean at those temperatures), and those that are too low. Although average reef temperatures in maximal diversity areas (i.e. coral triangle centered Indonesia,) these areas are also often subject to significant mixing. In fact, the cooler reefs, ( i..e. open Pacific reefs) are often more stable at lower temperatures due to oceanic exchange but are less tolerant to bleaching and other temperature related perturbations.

All things considered, those natural guidelines leave a fairly wide range of acceptable temperatures. I keep my aquarium at about 80-81° F year-round. I am actually more inclined to keep the aquarium cooler in the summer, when a power failure would most likely warm the aquarium, and higher in winter, when a power failure would most likely cool it.

All things considered, I recommend temperatures in the range of 76-83° F unless there is a very clear reason to keep it outside that range."
 

IceMan0124

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my temps shot up when I added a MH in my canopy, I bought this nest clip on , I dont know, tube type fan?, it kinda looks like a mini room AC unit, the type that is usally installed under windows, I dunno its very forceful for its size, , clipped on one side in the canopy blowing right under the lights, and the temp came doun about 7 degrees, and the top of the canopy is almost cool to the touch, its just slightly warm right where the MH fixture is, before it the whole top was VERY warm to the touch
 

Len

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Mine get to about 83 at most since it's controlled by a chiller. In previous tanks without chillers, my tanks would get to about 85.
 

pwj1286

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My tank has been to hell in back due to a fan failure, 87F. Lost a few things.

I am actually keeping my temp in my tank cooler the normal now a days. I got it running with my chiller at around 76.3F. This is just for winter. In the peak of summer I will raise it to 81F but slowly through out the year.

Another reason to 81F is to keep my chiller from heating my house up in summer. It wont have to work so hard. Save electricty and simulate the cycle of the seasons.
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Anonymous

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77 for a low and 78 for a high. I have 2 temp controllers, one for hot and one for cold. I really get no fluctuation really. One controls the chiller and one the three heaters. Works great for me.
 

Blazin__

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i run mine at 83 all year round... dosent cause any problems... its madit up to 88 in the summer once... lost 1 montipora cap. and thats aobut all..

o ya and my mandrine goby... that kinda made me mad
 
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Anonymous

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Mine usually runs around 80 most of the time. I have seen it get up to 82 a few times.

I prefer to keep it at 80. Personal preference I guess.

It is good to read that higher temperatures are acceptable though.

Louey
 

Dewman

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Same here, my 10 gallon nano stays between 79 and 80 all the time.
I love dual stage temperature coltrollers!!!!

Hope to have the new system up and running soon.
 

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