Thanks, all, for your responses. Yesterday I called a pro photographer acquaintance on the East coast who, like me, uses Leica equipment, and he said, "Since Microdol-X is mixed and successfully dissolved with 90-95 degree water, simply follow the instructions for mixing it but do it in your 1 gallon glass bottle. After pouring the initial dose of 3 1/2 quarts of water into your glass bottle, slowly pour the powder into the bottle, shake it intermittenly until it is dissolved, and then add the final half quart of water. This works for me every time and I never see or experience any debris on my negatives".