MSU fertilizer problem

[dennis]

my fertilizer is no longer blue is this je=ust a coloring that they add or is this something else i need to be concerned with. one container has been opened and one is still sealed from when i bought it

[Gin]

Mine does that it turns back to blue when it is mixed with water.
I shake up or stir the powder before using . Happy Growing Gin

[Ray]

The color is just a dye added so you can discern the solution from plain water. It's most helpful if you use a proportioner, as you can see when you run out of concentrate.

The dyes come in many colors and can change color based upon the pH. Your powder has simply absorbed some atmospheric moisture, resulting in an acidic pH, allowing the dye to show up brightly blue.

Incidentally, if you ever get the blue dye on you, washing with a basic chemical will break it down. Household ammonia is the best, but Comet works too - and no, I don't mean by abrading away your skin!.