Solution depends on what ...

Solution depends on what kind of filament. We get M. parvicella (think I spelled it right) and use Pax 14 to combat. This filament is a specialist in that it uses medium to long chain fatty acids for food, most like short chain, stores food, and faciltative so selectors don't work.

There are labs that can check to see what kind of filament you have, I would start there.