I noticed my Betta behaving pretty frantically the past 2 days and couldn't figure out why. I thought maybe it was because I was organizing in our office but last night I finally realized the heater in his tank is no longer heating the water. The tank is holding at 72 degrees, but due to the holiday there is nothing I can do about getting a new heater until tomorrow. I have looked around and we don't have any heating pads nor lamps with incandescent bulbs (or goosenecks that would really fit over a tank). We don't even have cheap plastic water bottles I could fill with hot water as we only use glass or stainless (and would prefer our used daily bottles not go in a fish tank). I did set our lava lamp next to the tank, as it's the only thing we have that produces a good amount of heat. The tank light also produces a minimal amount of heat (it's LED) but I doubt enough to raise the temp by much, if anything. Any other thoughts?