Citric or Oxalic Acid

[Tim Smith]

Which is better to neutralize/brighten?

What are some of the advantages & disadvantages of both?

 

[John Orr]

I've never used Citric Acid, but I pay $1/gal for the Oxalic and it works really well. In addition, Oxalic Acid can be used to renove rust from buildings/walks/driveways.

 

[Bill3752]

How about sulfamic acid? A little more user friendly.