Is it true that Duncan's can't tolerate temps over 80? I just picked up a piece with two heads that's been slowly opening over the last hour or so but someone mentioned they can't be in warmer temps. My tank is 82-83 all the time and won't stay lower than that for some reason. My heater is always set to 78 but it stays at 82ish regardless.
Duncan Temperatures
- Thread starter Aidenb
- Start date
TangingOut
New member
Unplug your heaters to see if the temp goes down. Heaters are known to have wildly inaccurate internal thermometers. What's the room's ambient temp? You can use fans across the water's surface in either the dt or sump or both. Even if your duncan is fine at 82-83, you're not leaving much margin of error.
Mark9
New member
I'm skeptical of this statement as my tank fluctuates from 81.0-82.5 daily, Duncan is fine, new heads, etc.
It seems ok and opened last night, haven't had a chance to see about this morning as I've been gone but my tank went up to 84 a couple times this summer and the coral and anemones seemed happy enough. The heater rarely kicks in and the tanks in a basement with an ambient of 70. Maybe I'll grab a new heater and see if that helps.
primetyme941
New member
+1 My tank consistently runs 81-82 and my Duncan has been doing well for 6+ months
Reef Frog
New member
Assuming your 70F ambient basement is fairly stable, it's odd your tank can run 12F-14F hotter then they with out the heater contributing.
Don't most tanks run about 4F-8F higher than ambient room temp? Your situation seems unusual unless you have like hooded MH fixtures, heavy duty old school pumps or something like that. Or your heater is cycling on.
I agree it's a good idea to turn off the heaters and see what happens with temp. I don't think Duncans are much different than other Pacific large polyp corals.
Don't most tanks run about 4F-8F higher than ambient room temp? Your situation seems unusual unless you have like hooded MH fixtures, heavy duty old school pumps or something like that. Or your heater is cycling on.
I agree it's a good idea to turn off the heaters and see what happens with temp. I don't think Duncans are much different than other Pacific large polyp corals.
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