To anyone who can help I am starting out in colour photography, and I have a few questions: 1) What is the best thing to use to keep the water regulated. I realize the water must be specifically at 100 degrees F; I'm using a steel developing tank (used for developing one roll of film only). I need something that I can put on the outside of the tank, and that I can hold while I am agitating the film. 2) How do I stop the tank from leaking! It's not such a big deal for B&W, but colour chemicals are a little bit more nasty. I have tried duct tape, but it doesn't work well. Thank-you to anyone who responds!