A microscopic video ; Thoses little rascals just saying. Take a look. Hoeven's Wrasse (Halichoeres melanurus) are one of the best way to get rid of them. Before using Flat worm Exit you should give nature its chance to help you out. Because chemicals always leave traces, and worm exit when killing your worms release toxins within the worms so you must do quick water changes. So just think or the Hoeven's Wrasse (Halichoeres melanurus), the A blue velvet sea slug (Chelidonura varians) , some mandarin do too.