No visual symptoms at all. His scales not raised, he is not darting, not bloated, no symptoms at all? How long he is like that? Anything new in his tank at all? Why spring water ? Is your tap water has ammonia in it? Did you try full water changes daily? Its just if there is not other symptoms but being lethargic may be something in the water?
Well you talking to very knowledgeable people here so you guys covered all questions.
Sorry, I've been super busy trying to get my animation final done >.< I did look at it breifly but I'll go back to see if I can answer since I'm giving myself the mandatory break after working two and a half hours haha