Metal sequestrant in borate pool

I have what I think are metal stains after using a stainless steel brush to remove black algae. If I add metal sequestrat, will it also remove borates in pool?
No.

And sequestrant will hold metals in solution but not lift stains that have deposited on pool surfaces.


Have you rubbed a paste of Vitamin C in a sock on the stains and see if they lift?
 
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