Okay, so he's still red and sick looking but he's definitely more alert today that he was yesterday and is even swimming around a little. Hoping that's a good sign! Especially considering he was knocking on deaths door, floating upside down being sucked over to the filter intake, just yesterday morning! The package of Triple Sulfa says to treat the tank again in 24 hours so hubby will add another dose when he gets home from work. We'll see what happens. He's not eating yet...and looking thin :-/ Have tried raw cut fish, rosy reds (which he usually goes nuts over), bottom dweller pellets and shrimp pellets. No reaction to any of them in days...and the feeder fish ended up nibbling on his fins some so they got tossed in the turtle tank.