X-Addict wrote:

Does anyone run their heater on a timer with the lights
such that it isn't able to run during the evening when
the lights are off? I've got a slightly older heater
that just refuses to keep the water below 80 degrees F
regardless of my setting.

Dude,

What you are asking is akin to the plot of the movie Speed. You are
courting disaster. Buy a new heater, or enjoy an unheated tank. There is
no safe middle ground for you.