FUnny. there's a guy near by that has the same issues and I've been coaching him through text messages. Big tanks= big problem. For humidity, I know you already have the foil, try using plastic + foil. First layer plastic and then foil on top. Should help a lot. Also get a bigger water bowl.Tanks have heat escape real easy thru the glass so you might want to insulate that as well. Ive heard styrofoam and cardboard used. For eyes, I dont know what's going on but it could be eye caps or dehydration. For eating, it's a 50 gal tank man...that's a lot of stress. More hides, better temps, less handling until settled and you should be ok in no time.