A small fish tank heater for about your res size works good. Just get one that you can set the temp on.

It was my grandmother I never knew. I have been looking through the old family records. Will talk to my dad about it and gets some names.
My dad is half Scottish and half Irish. Now there's a mix for ya. Now throw in some Native American, Portuguesse and a few others and you got a mutt like me. LOL The great melting pot.