Many thanks for this article, especially the information on cycling. I caught a number of Hyla versicolors this summer and was hoping I could gethem to breed in a 38 I placed them in with water. Unfortunately it was too late in the year and none bred. I lethe larger ones free but keptwo of the smaller ones to fatten up. I have taken the 38 and palced in near a window in our storage room, as close as possible. Then I took a opaque tarp and placed that around the window and over the terrarium/aquarium. I am abouto stick several thermometers on the window [inside] and inside the terrarium. It is my hope that thiset up will allow them to cool down enough and at the same time provide a bit of insulation from the outside cold. I left a good two to three inches in the aquarium so that if could act as a temperature sink; the temp shouldn't change that quickly. Will let you knowhathe temperature is if anyone asks. It has only started to get really cold here 0C/32F within the last week. I am wondering myself whathe temperature is in the tank myself. You can view the tank on my uTube site. YouTube - Hyla versicolor terrrarium Feel free to friend me on uTube if you're a critter caretaker!!