Ive been reading all the posts thus far on the subject...and I have (I think) a new question. My son and I went to a reptile show today and got a Zilla 10 gallon tank for our future baby corn snake and a ZooMed UTH that is about 1/3 the floorspace. I know we still need to get a thermostat and digital thermometers. My question is .... it clearly states on the UTH packaging that it is for glass tanks only. Yet the zilla tank (which lots of folks seem to recommend) is plexi. Is this an issue really? I would think the vendor .. MaxPet.net...would know what they are doing. Yet maybe they just knew a sucker mom and her kid. He seemed to think we were fine with a sticker thermometer that seems more like a moodring to me and CLEARLY that is not the case. Any thoughts?