Don't add too much ascorbic acid, however, as you will kill the stain.
What I would recommend is that you mix up a 1% solution of ascorbic acid and add about 10 mls of this solution per liter of working solution of Pyrocat-HD. This will increase the energy of the developer slighly as it reduces B+F by slowing down oxidation.
For my minimal agitation work I use a dilution of 1.5:1:150, which is not all that different from what Steve is using.
Originally Posted by Steve Sherman