Just want to thank whoever it was suggested I get a heater for my pearl gourami tank. I live in Hawaii, and heating isn't something we take seriously. But when I got a better heater (the small one was a joke and did nothing) even a 3-degree difference in the water made a big difference, especially, I'm guessing, at night. The male in particular came out of hiding. He still likes to stay in the empty planter a lot, but he comes out more, and eats everything that comes his way. 
