I'm new to analog photography, just started developing about a week or 6 ago. Is it a problem when you use the same tank for color and b/w negatives? I developed some color negatives a couple of weeks ago and (of course I washed out the reel and drum very good, Paterson) when I did a b/w 120mm the water was red after I developed. It is getting less and less now, but my b/w negatives show slight signs of darkish red coloring. Are these still the remains of a one time color development? And any ways to clean out the drum and reel thoroughly? I read something about vinegar.