Quote Originally Posted by PHOTOTONE View Post
You really should have no problem "topping up" your processor with properly diluted to working strength Ilford Multicontrast Developer.
You said you wanted to replenish an existing processor filled with the Agfa developer. "Topping up" means to add fresh developer to maintain a specific level in the tank of the processor. I don't think you would have any issues adding the Ilford Multicontrast developer to the Agfa developer already in your processor.