I use benzotriazole all the time. It doesn't take much. Maybe a dollar a year for a benz junkie like me.
I use it in my 130, replacing the bromide...a great developer
BZT dissolves easily in alcohol. I mix a 1% solution dissolving the chemical in 200ml rubbing alcohol, add water to make a liter. Easy. Quick.
Once I used a liter of alcohol to dissolve it, not knowing any better. Almost fumed me out of the darkroom putting a mere ounce in a tray of developer!
author, "Finely Focused" and "More Finely Focused"