Hmmmm stains? Maybe save it and use it with the Holga film? I think it was that you had? I don't know much about darkroom chemicals (yes I have played in a darkroom, but don't have my own to play in) is your darkroom air conditioned? Maybe it got too hot? Has to be a reason why this happened. I personally would have a hard time throwing away a bottle that is 3/4's full too, but I would also want to know why this has happened. Brenda :)