For getting purple out of TMY using 2 minutes with Kodak HCA really helps. I use Kodak Rapid Fix but Ilford Hypam or Rapid Fix works the same. I use fresh fixer and if I'm using the Jobo I go at least 5 minutes with the t grain films.
The KHCA really helps with the dye. And as others have noted it takes time . A change in concentration over a distance is called a concentration gradient, this takes time . Blasting huge amounts of water while washing film or paper is a waste of water .
Bottom line try Hypo clearing agent , and yes Acros is wonderful film, I have a lot of 120, but didn't put any sheets away.
MHO Best Regards Mike