Ridding Tank of Brown Flatworms

[Puff]

i just got home from a trip, only to discover an explosion of brown flatworms. they're everywhere!!

ive read that there is a certain type of nudibranch that will eat them, but i have probably 0-1% chance of finding one around me.

are there any other fish that would work?

it's only a 24 gallon aquapod, so i dont want to try a psychedelic mandarinfish (even though i have a ridiculous pod population). what about a sixline wrasse or something?

ive started syphoning them out, but ive barely made a dent in the population

any input would be awesome! id prefer to deal with the problem "au naturel" instead of with drugs.