Thanks guys. I've been pondering this (yes and getting no work done).
I am now running 3 pumps in my sump, one for the UV
, one for the skimmer and one monster for my main water flow. (you can see my sump area in my gallery).
I have the feeling thats the problem and I need all 3 so they can't go. I also have a glass top on the tank. I'm going to take out part of the glass top, replace it with eggcrate and see if that helps.
Also gonna check to see if I may have a pump running too hot.
If that doesn't do it, I will consider the fan but the only place I could run it is below by the sump.
I know 84 isn't critical, but I prefer not to skate a thin line.