Until recently I was purchasing the 1lb containers of Jack's. It was working great so I decided to go with the 25lb bag. I received the bag and is a much different color than the stuff I had previously. The new stuff has a very blue tone, almost as if it has CalNit mixed in. The bag shows the same analysis as on the tubs I have but mixes a different color as well. The older stuff mixed up to a light yellow color. The newer stuff mixes to a dark blue, darker than that of the CalNit. Has anyone noticed a change in the dye color? It is either that or I was receiving/did receive a bad batch.