I have Julep in his 2.5... he's always been perfectly fine with warm water. Thankfully it is warm from March or April to usually the end of October. (Right on schedule!) But today his tank was at 68*!! Not okay in my book! He was still his happy little self, but I don't want to risk anything.
My problem is during the day it's going to the 80s, so I only needed it heated by a few degrees during the day. At night, I need it to be heated by about 10*. Obviously those mini heaters that heat 3-5 degrees above the air temp won't suffice. Then once March-April hits, I won't need the heater during the day, but would like it to be there in case we have an off cold day, but will need it at night. See my dilemma?
What are my options? I haven't seen adjustable heaters this small.. am I missing them? Or are there over non-conventional heating ways I should explore?