If you don't already have a refugeum I would put one in and buy some Caulerpa that is infested with them, the refugeum might keep a steady supply of flatties for slugs.
this is how I ended up with my flatworms, my flatworm problem started when I built my refugeum, the caulerpa that I bought was infested with them, it was too late by the time I noticed.
this is how I ended up with my flatworms, my flatworm problem started when I built my refugeum, the caulerpa that I bought was infested with them, it was too late by the time I noticed.