<a href=showthread.php?s=&postid=12583113#post12583113 target=_blank>Originally posted</a> by xJake
The above is simply not how heat works. In the summer the tank temperature will rise to the ambient room temperature. If that so happens to be 83F then his tank will reach a max of 83F. If he raises the temp on his heater to 83F (or w/e the ambient room temp. is) then the tank temperature can go no higher. Unless his tank is in direct sunlight then there is no reason why it would go anywhere near 87F is the ambient room temp is lower.