What is the highest temp your tank ever got ?

95 F. I lost my candycane coral, open brain, cleaner shrimp and bocolor blenny. my other corls looked bad for a while but have rebounded. I had a heater malfunction.
 
89F for a day -- the heater stuck in the 'on' position and took the temperature up five degrees in a short span of time. Two corals bleached, everything else was just fine. The bleached corals are coming back nicely, no permanent damage.
Right now it's HOT here and there's not much I can do other than crank up the ceiling fans and a/c; because we live in an apartment and get heat from all the floors below us, even that only takes our apt temperature down to 82F or so. All the tanks are at 86-7F, but everything's fine so far.
 
<a href=showthread.php?s=&postid=7589737#post7589737 target=_blank>Originally posted</a> by spoiledcats
105!?!?!? geeeez. Mine got to 92 once...

Unfortunately, that wasn't due to outside temps, but from a heater malfunction.
 
89 degrees for 3 hours under 250 w mh lighting in a 52. Coralline bleaching over 1/3 of the height of the rocks.

Some experts are now suggesting that lighting plays a part in bleaching. I'd be curious if those who didn't have bleaching were under less light.
 
No bleaching. 250W MH over a 30g hex. So for me, heat plus light didn't equal bleaching.
 
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