I just mixed up a batch of Ansco (Formulary) 130. All of the chems were in separate sealed baggies, and the package was probably 9 months old overall. I mixed with distilled water as directed, using what I believe to be clean glassware. When I got to the last ingredient, glycin, the whole solution turned a dark brown, like a strong cup of tea. Is this normal / okay? Should I make a fresh batch?