Hi and welcome - sorry I don't know that tank so I can't help but I'm sure there will be others along shortly who can help.
Me, when a thing jams I either get out my plumbner's wrench with cushioned jaws or try to unscrew it with a a cut off piece of the mesh used to cushion porcelaine sinks ... which solves the problem 90% of the time ,,, and if it doesn't then the thing goes to Vape Heaven via the recycling bin and gets replaced.