I stumbled upon some expired, unopened Brovira Grade 3 that I plan to use it in my ordinary developer, which is LPD.

I generally use the LPD diluted 1:1.

I am wondering if I add the benzotriazole (from Photo Formulary), how much I should add and if I need to add it at the beginning of each session or if I can add it once and re-use the LPD as normal.

On a separate note, would i have better luck using the Brovira for lith prints (is there less of a chance of a fog this way?)

Cheers,
Phil