Heat question

[GaryP]

I think adding moving air may also help with gas diffusion at the water surface as well. Slightly off topic, but related to the discussion here.

[TheOtherGuy]

Gary - Yes Perhaps. I know fans help with my gas diffusion. LOL.

Anyway....

I just know if the fans do not do the trick for me then either I quit doing Acros in my tank or a chiller is in the future. Oh and the fans I have are not small fans they are fairly large and are moving some air. One runs all the time and the other comes on when the lights come on. According to one of my digital thermometers and min/max memory, my tank is now only varying 2 degrees over the day, 77-79 and that is a whole lot better than last week 79-87 YIKES!.

[jc]

I noticed that my digital thermometer is reading 80.5 but my cheapo metal thermometer is reading about 78.
Not that big a difference but still.

[TheOtherGuy]

Yes these digital thermometers seem to be off sometimes. At least the inexpensive ones. I brought home a good old fashioned floating mercury thermometer. I shall put it in my tank and see which thermometer is telling me the truth.

2.5 degrees may not seem like a big deal but...... If your tank is over heating or close to over heating the difference between 82 and 84.5 could mean the differenence between life and death especially for SPS stuff.

I still have some SPS that are recovering from my 3 day overheat. My tabletop which was doing just awesome (until last week) has RTNd a bit but is hanging in there. Only time will tell.

[GaryP]

Its not actually a mercury thermometer. They use alcohol with a red dye. Sorry for the interruption.

[GaryP]

Mark, I am using 4 X 100 cfm fans on my tank.