Leaf stain in slabs - how to shift?

[Richard Ivy 14]

Until my super duper 200BAR pw arrives from the US, I have to soldier on with my crummy 120 BAR machine.

I cleaned some cheap looking slabs today for a neighbour, but couldn't get rid of what appears to be, pretty sure of it, stains left behind by leaves. (brown/rusty colours).

I think I have read somewhere on TGS about this, but can't find it.

Has anyone a tip on removing these stains?

Thank you.

[jkevin 15]

ok decided bleach is the thing to use for leaf stains now hot or cold water to complete the job?

[Adrian 155]

Really doesn't matter if it is hot or cold JKevin, the SH will take care of the tannin.

[jkevin 15]

thanks a freebie for knights of columbus did not wanna drag my trailer out