I didn't realize they've come down so much in price. Another really useful application would be to hook it up to pads used to ice joints post joint surgery. I was sold a $100+ dollar medical device which was basically a water pump in a cooler chest (like one of those Polar ones) that circulated water through some pads. I had to refill it every hour or so with ice. This is right after a knee surgery so caring the cooler around was literally painful. Having it connected to the aquarium chiller would have been great.