So, I’ll be doing my processing in a 32oz/1L steel tank. I will literally poor almost the entire lot of bleach into the tank and still be able to use it for 20 or even 30+ rolls?
Yes. It's quite durable. I put close to a hundred rolls through one liter of bleach with my last kit, and only retired it because I had to buy new fixer and felt like I got my money's worth. You're more likely to lose the bleach to attrition or dilution from continued use than exhaustion.
There are some "best practices" and maintenance you should perform, though, to help preserve the bleach:
- Aerate it regularly. Shake it up. It thrives on oxygen.
- Add a stop bath then a quick rinse after development and before bleaching. This helps preserve the bleach's pH. I use white vinegar plus four parts water for one shot stop bath.
- After the quick rinse (described above) take a few extra moments to drain the tank completely. Shake, rattle and roll and get every last drop out. This will keep the bleach from diluting too quickly with continued use.
- Filter it periodically or whenever it looks sludgy.
If you're creative, you
could use 500ml of bleach in a one liter tank. It's what I do. I put the tank in a drum then on a roller base -- so the tank is on its side and constantly turning, fully covering the film. Alternately, you could agitate it by hand continuously for the three minutes (it goes fast).