So once again what your saying is "It All Depends"
On you giving situation with what you have in your pond fish wise.
A temp of 80 all through out my pond would be ok with the type of fish I have LMB/BG/RES/HSB... but if you had trout or maybe SMB that would prefer cooler water then running your air 24/7 may not be a good thing to do in the heat of the summer...
RC
