I still say it's carbon plus other crap.
look at the top of the skimmer neck in the first pic, that film is carbon residue.
silicone does not breakdown like that.
it was glass, silicone, cutting board, water, and salt.
what kind of water did you use? filtered or tap?
look at the top of the skimmer neck in the first pic, that film is carbon residue.
silicone does not breakdown like that.
it was glass, silicone, cutting board, water, and salt.
what kind of water did you use? filtered or tap?