well, I brought my karelinii to my apartment yesterday, and while a few days ago I was comlpaining about the heat it has turned pretty cold this weekend. This combined with the window fan blowing over my tank has lowered the temperature of the water from about 70 to the low 60's. I noticed this morning that my lone male has grown a noticeable crest of about 2mm from the barely discernable ridge of two days ago. I find this very interesting and was wondering if others have noticed such a swift growth of crests due to temperature changes like this? I am going to monitor this. It would be surprising if he and the females went into breeding this fall. They are not even a year old yet. I need to get a camera.