ive purchased a bamboo shark 3 days ago. when i bought her she appered healthy. she has sence developed the red rash on her belly. ive had a newly hatched male for about 3 months and no problem with it. ive read about alot of reef scrathing the bellys of them, so i kept this in mind when setting up the tanks. i had a couple small caves made out of smooth rocks and my sand is pretty fine corsed stuff. ive removed the caves sence then and also had some little junky artifical plants i took out. can this be fatal??? is there a med for it??:help: