I too, use the Ilfostop. Great stuff. Lately howeverI have been using TF-4 alkaline fix which requires only a water stop.

Before that I used to use stop bath and fix in their trays with plexiglas covers over them so the fumes were virtually unnoticeable.

I still have plexiglas covers for all my trays that use strong substances like fix, selenium, etc. Even with proper ventilation, leaning over the trays while working gave me more of a snoutfull than I liked.

Michael McBlane