He's in a 10 gallon. the zoo-med rated 10-20 gallon heat pad isn't raising the tank temp even to 80 on the either side of the tank and my humidity drops like crazy over 4 hours to like 60-70 % without constant spraying once it heats up in by about from 73 F to like 78ish with the pad plugged in. Why no red wrigglers? an earthworm is a earthworm isn't it? I'm about to go get some substrate so I can change his stuff out. I could also throw him in a 5 gallon with a mesh cover if that would be better but I don't think he would stay as humid in there. I treat the water with Prime by the way I own fish as well so I'm aware of the tap water problems in Edmonton. Probably use just normal soil or peat mixed in like a 30-70 cocunut fibre with a egg crate bottom with like lava rock to absorb some run off from the plants and get some bio filtration going. I've been told by other letting them live at 75 is fine so please reference why I must have him at 80-82 during the day especially since he's almost not a baby any more. I know you know more than me here but I just don't think I'm gonna be able to get his home that hot maybe if i transfer to a 5 gallon. To be honest he seems so active and happy behaviour wise when the tanks at 72 at 2 am lol. miserable and still at 78 with a 70 % humidity unless I watch it like a hawk with constant spraying if the heats on.