It was hot today, and it's very mild this evening. Perfect for a dip in the spa.
So I cleared all the junk off the top of the heater, moved the valves to spa in, spa out, and was about to turn the heater on, when I had a brainstorm: Why am I heating all that water? As soon as we get in, a couple inches of hot water will get displaced and flow into the pool. So I moved the valves around and sucked the spa down about 4", and then put things back and started the heater. I also stuck an old yogurt tub lid over the air intake, as the bubbles tend to cool the water off.
Does this make me a miser?