Waldo lives in a 5 gal hex which most of the time is like a sauna around 80 degrees. Now that the weather is getting chilly I am worried he may need a heater? My other two tanks have their heaters on to keep them at 78 but so far his has not dropped below 78 without a heater. The 10 gal and 20 gal dropped to 74 and 72 without the heaters. With they tank construction I only see that I can put an immersable heater in but do they make one for 5 gal tanks? Just thinking ahead to make sure the little guy doesn't get chilly!
