yellowish streak on bath

[jetcat32]

does anyone have any idea how to get rid of a yellow stain on a bath - i have only recently moved in, and think the cold tap must have leaked in the past, as there is a yellow line running down towards the bottom of the bath.

Limescale remover?

Apparently one from Lidl is much better than other brands

thanks is that what it is!! will try that, as lidl is close by.

many thanks