We make Shampoo in 500kg batches in a tank that some parts in the bottom is made of iron. Shampoo color is kind of yellow as we add orange essential oil and no other color. We then transfer it to another tank and fill the Bottles from there. Last week we made a batch and didn't transfer it to another tank. From the part which is made of iron and connected to pipe it has started producing red color in the pipe and slowly increasing day by day.
Is it contamination or iron oxide from iron part?
If iron oxide then is it harmful in Shampoo and we should remove that part or it is ok and we can mix it with the rest of Shampoo?
Pictures are attached.