Who Gives A Fish Forums

Another thing to watch for is the flatworms coming back after treatment. Sometimes they're sneaky and pop up again. Regular siphoning helps keep 'em in check.

Yeah, they're stubborn. I've had to treat my tank twice before they were gone for good. Patience is key.

If you're going the natural route, a wrasse is your best bet. Just make sure your tank's lid is tight, those guys are jumpers.

And if you do get a wrasse, feed 'em well. A hungry wrasse is more likely to go after flatworms. Mine loves mysis shrimp.