So I bought one of those Reptitherm Under Tank Heaters, wondering if coturnix quail chicks would appreciate it or if it would be a waste of money. My brooder is a 30x18 clear plastic tote with 150w white heat bulb over one end. My thought was that if an uncoordinated baby wandered away from the lamp to the cool side of the brooder, he'd at least have a lesser form of heat he might still find. First ever chicks are a day old now and... it's their FAVORITE spot in the tank. My guys love their warm feet and tummies and could care less about the lamp. I have the mat laid on top of their paper toweling with a cheap (not thick) washcloth on top of it and it's cord draping over the brooder to the outside. The mat actually has a sticky underside to permanently affix it to aquariums, but I didn't peel the paper off. So nothing is permanent about it. The mat doesn't heat the air, just the washcloth. It was money well spent. At my local pet store there is one size smaller than mine and several sizes larger. If you buy one, be aware that the package is larger than the mat and lists gallon size, not inch size. For reference, my 10-20 gallon one is maybe 5x8". There is no temp adjustment, just heat. Be sure to cover it with that washcloth for traction and to ensure it's not too hot on little toes.