Resurrect slow blue toner?

Hey, everyone.

Does anyone know if I can add ferric ammonium citrate to blue toner that's nearing exhaustion in order to resurrect its powers?

Or do I need to mix all new toner?

Inquiringly,
Phil

Maybe, but why bother? The ingredients are so cheap; just mix a new batch.
When it comes to toners (with the exception of selenium toner), I mix only as much as I'll need for immediate use.

Thanks for the response, koraks.