Removing developer tar from a Nova deep tank

AllanD said:

Does anyone have a recipe for a good RA4 developer tar remover. I've used Nova's own product, and it works well. However, I've just run out and was wondering if there is a cheap alternative.

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• - 1 part 60% Acetic Acid (as in Stopbath concentrate)
  - 1 part Pure IPA (Isopropanol >98%)
  - 1 part Aqua Dest. (de-minerialized water)