Mold??

Hey wasn’t sure if this was mold or nute buildup?

No man, salt build up from dirt and chems. Should be able to whip off, if not get a damp rag and it should come off.

Thank you

yep, not mould deff not. great advice above ZuuTeD614 has given you

Sorry to piggy back on this post, but is this a similar thing ie. salt build up? I noticed my last grow had it on the sides of the fabric pots so I went with plastic this time for that reason and it's already showing similarly to the last grow.