Aw, Nanner is one happy guy! =0) It must be warm where you are, or he's in love.

Logan, what is your tank temp? If it is 75-85*, fairly humid, he has clean water/space and he's eating well, most healthy boys make bubblenests (not always as big as Nanner's, though!). Some boys, though, just aren't cut out for fatherhood and aren't interested in nesting. hehe.