i agree with jinkz, i saved some mts just in case treating with both forms of maraycyn and neither actually killed them off. As a note though, mts are great for a planted tank and you wont get over populated if you have a predator for them lol.
:iagree:I doubt MTS will be effected by using the antibiotic, more sensitive snails like nerites or apple snails would be at risk.
There are meds that do affect some species but as MTS have trapdoors to save themselves from the toxins, I doubt some MTS will die. Some might die, some probably won't. Just check the water parameters afterwards to make sure the ammonia and nitrite don't kill the fish.erythromycin shouldn't have any effect on MTS, since it is an antibacterial medication. antiparastitic meds are another story though.