baji again...
Here most of the lfs near me only have basic meds, so I found something through Google, its potassium permanagnate, (I know the spelling is wrong)... overdose will kill everything in ur tank including fish... correct amount of dose will kill all types of external parasites and its unhatched eggs within a day... PP will suck all the oxygen present in the tank, so add an airstone... Google it for more details...