I've had these for a while. Hard to control once they get started. I've
used the Kalkwasser solution for the big ones. They are more prevalent
in my sump.

I've tried the peppermint shrimp, but they keep ending up being an
expensive meal for my fish. I suspect the 6 line wrasse is eating them,
but I can't be sure. I also have a yellow tang, damsels (2), a clown,
and a coral beauty. I've also lost some cleaner shrimp. Guess my fish
just have expensive tastes.

Hope you have better luck.