Tank temperature is a highly debated topic throughout available Reef articles/books.
I have been keeping mine right at 80 degress (measured in the sump) since starting up. However, recently, when placing one of those sticky "strip" indicators on the bottom of tank, I found it read only 78.
Am sure I would get a higher reading near the top, but am wondering now if it should not be more.
To test, (timidly) I raised the sump water temperature to 82. Was not long before the outside indicator (at tank bottom) went up to 80.
Was also not long after that I noticed BTA (located about midway in tank) opening up and "reaching" much more fully then I have ever seen it before. ("happiness indication"?
)
While fish may be fairly tolerant of considerable temp ranges..I wonder about inverts/corals.
May be explanation why I have never had any success with either colt or kenya tree corals which have totally disintigrated after introducing to tank. - up to now have attributed it to some toxic imbalance with other species in tank. Am now not so sure.
Should I move it higher yet?
Wondering,
OmarD
Observation 
