My tank has been unbelievably "peaceful" for months now but I've noticed a few red flatworms here and there. Nothing new in my tank for 4 months so kinda a random outbreak but I'll make it. It's a 28 gallon with plenty of room for another fish so I guess a wrasse is in order. Do all wrasses eradicate flatworms or just the 6-lines. I'd rather have a McCoskers or Flasher,etc but if they don't eat flatworms I'll stick with a 6-line. Thanks.