I’d love to try that, but just not sure if I want to risk it. May just be ending up cutting off the sections that have the glue and redoing it with the correct stuff I originally intended on using. Will make it slightly smaller but it was already an extra large box to begin with. Unless others chime in and would agree with that ideaSoak it in ro water for a week followed by saltwater. I would not be too worried about leeching chemicals after that as they would be tiny amounts esp for the short time it is in the tank. . But that is just me.