AdoxAdofix P powder concentrate for making 5,000 ml solution

I have bought this previously from another supplier. Quite simply, this is a powder form rapid film fixer at 1/3 or less the price of the competition. You just make up a solution by adding water to the correct total volume and away you go. Seems wash off quickly in the final wash, fixes 35mm film in around 4 minutes and lasts well.I cannot fault it and have switched from Ilford Rapid Fixer to Adofix P instead.