Quote Originally Posted by Michael R 1974 View Post
.................2. How do you mix your benzotriazole solution?..........
It will dissolve in water better if it's a bit alkaline. Since you're making a developer with quite a lot of carbonate, a pinch of that could go into the water in which you're making the benzotriazole solution. You won't have to account for the carbonate in it when formulating the developer, since it is insignificant.