As you may have guessed by the title, I cannot afford a chiller. I know bimacs need a cooler temp, but there is no way I'll ever affod a chiller. How else can I cool my tank, because I don't want to keep an animal in unfit conditions. I try to keep all my animals in tanks/terrariums that at least try to mimic their homes. I've found it helps them feel more secure, plus it just makes sense.