> If the copper is bound to the hull paint well enough, maybe it’s fine? Or maybe fine in fresh water. If it's bound up in the paint matrix it's kind of hard f

> If the copper is bound to the hull paint well enough, maybe it’s fine? Or maybe fine in fresh water. If it's bound up in the paint matrix it's kind of hard for it to poison those pesky critters, no? AFAIU all biocide based anti fouling paints work by being more or less ablative, continually exposing fresh biocide to the surface.