uhmm...i would definitely not only go with the fish and siphoning. do not underestimate the damage they can and will do. its your tank, but i would advise definitely getting the flatworm exit soon.
PS: i've tried every fish except for the leopard wrasse and even tried the blue velvet slugs. they didn't put a dent in my problem or didnt eat them at all. if your thinking about the nudis, your crabs will eat them and they will die. i do not suggest getting them nor any live stock for the sake of treating flatworms.
PS: i've tried every fish except for the leopard wrasse and even tried the blue velvet slugs. they didn't put a dent in my problem or didnt eat them at all. if your thinking about the nudis, your crabs will eat them and they will die. i do not suggest getting them nor any live stock for the sake of treating flatworms.