I've been getting a bit curious about divided developers recently, and so gave one a try. At semi-random, I picked the General Purpose Divided Developer formula from Anchell's Darkroom Cookbook, 2nd Edition (formula #5 in that book). This has an MQ bath A and a bath B that consists of sodium sulfite and borax. I tried it out on a roll of 35mm Fomapan 400, but I got very thin negatives. On more (and more careful) reading, I found advice to use continuous agitation with divided developers, so I shot a roll of medium format Fomapan 400 and tried it again, but the results are, if anything, even thinner. I also noticed that bath B is producing a sludge-like gray precipitate that's coating the bottle. (Bath B is supposed to be good for several rolls.) So: Is the sludge-like precipitate normal, or is this a sign that I mixed it wrong or have some sort of contaminant? (I mixed only half a liter rather than a full liter, and it's conceivable I neglected to halve one or both of the ingredients in bath B.) Is it likely that this developer would work better with other films? I'm reluctant to use it again, but I'll do so with another type of film if this developer is known to produce poor results with Fomapan 400. Any other suggestions for divided developers to try? Aside from curiosity, my main interest is in finding something with consistent development times across films, which can be handy on those occasions when I've got a roll of an unfamiliar film and can't or don't want to do a test roll to find the optimum development time.