thank you for the reply, ill go about testing the stains tonight with a trichlor puck since i dont have any vit c. if i just put the trichlor puck on top of the stain and let it sit there for 30-60mins and the stain is organic i should see some lightening correct, that period of time is enough? if the puck does nothing the stain is not organic and i need to get some vit c. will post results tonight/tomorrow