Xtol shelf life? Particles floating on bottom of bottles..
I store my xtol in plastic soda bottles. Once I developed a roll of Neopan 1600 with about 5 month old xtol. It came out severely underdeveloped, and when looking at the bottle I saw some kind of white, fungus-like particles floating on bottom of the bottle. I dumped rest of it and nearly thought of stopping using xtol completely.
I still had a extra 5l set of xtol though to get rid of, so one day I mixed it. Now it's maybe 2-3 months old, and I have two unopened, full 1,5 liter soda bottles of xtol left.
I thought of developing a few rolls today, and when examining the bottle I saw these same kind of particles floating on bottom. I'm very hesitant to try to develop anything with that kind of looking stuff again, so....
What I am doing wrong? Kodak promises at least six months of storage life, but I've never gotten it myself. Do the soda bottles suck? How much storage temperature affects it? It has been around 20-26C depending on time of year. I must be doing something wrong since other people have so good experiences with xtol.
When turning the bottle around now it's naturally full of that stuff... took a photo: