I use the old standard Oxynate #7 from the 40# pails....... I can't remember the mix because I just fire the burners up when I've a batch of bluing, but it's on the buckets
I _think_ I use less than a bucket in a 5ft stainless steel tank????
A small Lee lead lead pot. A kit from the guy in Canada for about $100. Heat the salt to 750f or so and dip the cases in the molten salt for 5 or 6 seconds, toss them in water to dissolve any remaining salt, dry them ( I put mine in my kitchen oven @ 200 for a few minutes), let them cool and use them. Very easy. Be sure to get the case holder and the thermostat with thermocouple.