I did post something similar to this sometime ago but I wanted to ask about presoak times. For a long time I am using distilled water when I use the developer. I use T-Max 400 film in formats from 35 mm to 8x10 processed in a Jobo CPP2. I generally give it one minute Pre-soak. Kodak told me all their developers are designed to work with filtered tap water, which I do have. I was getting some "Motteling" but I have not resolved that problem. Could I possibly use a 1 1/2 to 2 minute presoak and how would it effect the film? The motteling is on all formats and it follows the rotation of the Jobo drum. The emulsion IS ON THE INSIDE as it should be. It can be seen only on contact prints and enlargements and of course it happens in super clear skies without clouds. Some images can not be taken again. Any help is appreciated!