Hi im getting a 20 gallon terrerium for my leopard geckjo. Is this the right setup? 2 hiding spots 1 on cold side 1 on hot side,under tank heater, water dish, humid hide,decorations, food bowl and calcium bowl. How can i prevent an uth from cracking the glass. and how can i introduce a juvinale gecko to my adult female? and latly my gecko hasent been eating as much and hasent been active. he was just moved from my grandmas house with much cooler tempratures and he was active then. but is it cause its winter now? thanks for any help.