Just dosed my 55gal with PimaFix and MelaFix to treat popeye and other random illnesses, and noticed my black mystery snail acting sickly. For a while he'd float across the top, then he fell down to the gravel, leaving this odd mucus trail all the way down. He's since been laying on the bottom, stretching out from his shell, spasmming, and then drawing back in. He's done this numerous times and I'm starting to worry. Is it common for these meds to harm inverts?