Response to airbells sorted, but now streaking...

thank you henry and george for your replies. I've always done all of what you do, George [except I always thought it was ancient Egyptian method of agitating, not Chinese]. Your points Henry about the problems of using manual agitation and a tank overfull of chemicals are valid, and I will try a larger tank when I can afford it and the different agitation methods and tank filling you suggest. I'm just baffled about the sudden appearance of these streaks - logically they should have been present all along if my method is the problem.

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