I took delivery of some concentrated developer a couple of weeks ago - it appeared to be a lovely turquoise liquid at the time, with instruction to add distilled water to make 1L. A bad dose of flu hit me so I did nothing with it and am now preparing all the chemicals to use tomorrow. The concentrated developer appears to have separated into a brown liquid on top and light blue crystals on the bottom. I tried mixing but it just seems to stay separated. What's going on with it? Should I just add the water to it? Appreciate any help! AF.