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Thanks!I keep my lps dominant mixed reef at 76-78 degrees Fahrenheit . Seems plenty happy . That lower number seems a bit chilly honestly.
I personally run my reef at 24°C and not often higher or lower. It can drop to 23.8 sometimes but it’s uncommon.
My assumption is the reccomended range is found to be something suitable for corals and fish from all the commonly collected areas of the world. Australia, Fiji, indonesia, Africa etc.
some might get warmer and cooler at different times of the year but all should be 78 sometimes and not cause issues
Total disclosure - I made this completely up. But, it makes sense. I could be completely wrong too
There was an article that discussed coral metabolism and temp. It depends on where the corals evolved, but the drop in metabolism was significant, like 10% slower for a degree or 2. So if you run a tank at 10 degrees f less, the coral is not thriving, but 'operating' at 50% efficiency, maybe barely surviving.
70-71°F seems too low.
Ideal temperature really depends on what you keep and their collection locality. Seeing that you live in Indonesia, most of the corals you get are likely collected locally, so they would prefer temperatures of ~77°F. If you were to have corals collected from higher latitudes, such as Australian Scolies (Homophyllia australis or cf Micromussa pacifica), Micromussa lordhowensis, Homophyllia bowerbanki, Paragoniastrea australensis, or Australophyllia wilsoni, then you would want cooler temperatures for your tank.
This is what I was talking about, however, even 77 seems a bit low. Look at the chart, only a few months of the year are as low as that.
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Interesting graph, is that surface temperature or 10 meter down or 30 meters down or even deeper? Most LPS are collected in deeper waters.
Darren
While it is true that most LPS in the hobby are collected from deeper waters, it wouldn't be deep enough to have a significant impact on temperature. The maximum depth most corals would be collected would probably be 35 m/120 ft (deepest you are allowed to go for recreational SCUBA diving), which barely touches the upper mesophotic zone. This is why you usually don't see REALLY deep-water corals such as Euphyllia (or Fimbriaphyllia) baliensis or non-mycetoseroides Leptoseris imported for the hobby.Interesting graph, is that surface temperature or 10 meter down or 30 meters down or even deeper? Most LPS are collected in deeper waters.
Darren