Are these polypropylene bags reef safe?

[Stelioshah]

I want to use some bags in a canister filter, I managed to find polypropylene bags but I am afraid of color leaking out them. I am not sure if there is any color on the bags but it could be. What do you think?

 

[Saltyreef]

Yes PP is reef safe

 

[Stelioshah]

Yes PP is reef safe

I think that the bag is purely made of plastic I am afraid of the white part at top, it could be colored. Would you put it in as is? I could bleach it and clean with carbon but is it necessary?

 

[Saltyreef]

I think that the bag is purely made of plastic I am afraid of the white part at top, it could be colored. Would you put it in as is? I could bleach it and clean with carbon but is it necessary?

When something is deemed reef safe, its graded for food contact.
I highly doubt you will have any issues.

FWIW I use poly bags as is and the tie is usually fabric.