Before you move it off, why not consider using it? Combined with a bit of Potassium Bromide and it makes a classic bleach, the precursor to many bleach and redevelop sepia and other type toners.

It is also used in film intensification as the first step bleach.

The solution can be re-used many times. I presume it is Ferri. Ferro is what Ferri becomes after it has bleached silver.