***Quarantine
A good quarantine consist of observation and proactive treatment lasting at least two weeks, prefer a month or even longer.
1)Observe prospective feeders at the LFS very closely, appearance, swimming, respiration, feeding and etc...
Any dead/unhealthy fish in the tank or adjacent tank(s), don't buy any.
2)Before introducing to QT, give'em a strong salt dip/bath, this will force many external parasites to drop off the host.
3)For ICH... QT should be kept at 87'-88'F and salted at at least 1tblspn per 5gal, this will eradicate any ICH and some other parasites.
4)For suspected Internal infection/infestations... Feed at least one week with antibacterial food and then at least one week with anti-parasite/protozoan food.
5)During this time observe closely for anything indicative of illness/infestation, treat accordingly with meds or just cull.
A proper QT is alot of work.