Hey guys, We are nearing the completion of our walk in enclosure for my two mertens! Yay!!! But, I am indecisive about a few things... firstly, water heating.. we have two ponds with water features. The little pond can be heated with an aquarium heater I believe. But the big one is about 1600 x 1000 with a 1000 x 1000 wall water feature thing. (Sorry dont know proper name ☺). We have 1 basking and night heat light on the edges and the room will always be kept warm. My problem is whether the water will stay warmish and an aquarium heater will be enough, or am I going to have to go bigger and get an instantaneous gas type unit? Has anyone had any experience with larger bodies of water???? Also, best type of monitor hides?!? Ie, built down in the dirt more, or raised? Dirt or solid floor etc Any suggestions or advice will be greatly appreciated!! Thanks so much! Have also included some photos to give an idea and MY (probably not 100%) dimensions.