Ascites is a fatal condition eventually and unfortunately. It means there is liver failure from a heart or liver problem, but is also very common in egg yolk peritonitis. I would make sure that she is getting some form of electrolytes in her water, such as SaveAChick, undiluted pedialyte or Gatorade, or a couple of drops of Poultry NutriDremch or Poultry Cell. She has lost electrolytes in her abdominal fluid. Most times when people drain bellies with ascites, they get a deep amber-colored fluid. I'm not sure why you are seeing green fluid, unless it is super dark or there is bile coloring it. I have not done that before, but you may want to look for posts by Speckledhen or Casportpony who are familiar. Here are some links to read:
https://www.backyardchickens.com/t/853726/ascites-in-desperate-need-of-some-help-and-guidance
https://www.backyardchickens.com/t/1119656/drained-ascites-fluid-and-now-in-respiratory-distress/10
https://www.backyardchickens.com/t/853726/ascites-in-desperate-need-of-some-help-and-guidance
https://www.backyardchickens.com/t/1119656/drained-ascites-fluid-and-now-in-respiratory-distress/10