Dude, I found an extremely brief answer that I gave three years ago to what's a good reef tank temp. That's why I mentioned it in this P.S. in my previous post. I couldn't believe I could be that brief.P.S. -- Charlie, the Fijian water temps chart can be found in this thread from three years ago. My position on reef aquarium temperature is best put forth in my post #7 in that thread.Here is Post #7 in that thread in its entirety:
If you keep your temperature below 85 degrees Fahrenheit, you will be safe. Even though corals can tolerate brief periods of high water temperature (high 80's F) in the wild, aquariums are a different matter altogether. A temperature of say 86 degrees Fahrenheit is probably the upper limit for most corals in captivity. There are a lot of reasons for this and many of them have to do with the fact that it is impossible for us to mimic many of the natural conditions, especially water flow, in captivity. I don't think it's a good idea to ever let your tank water temperature exceed 84 F.The actual answer is that final sentence but I couldn't be that brief. I had to build up to it a little.
A safe range for a reef aquarium, IMO, would be 79-83 degrees Fahrenheit. If one has a chiller and is able to maintain tight control of the water temperature, 81-82 F would be ideal.
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