[e46er]

So i introduced a kole tang into my tank after a 5 week QT middle of Jan.

he was the last fish to go and i was done low and behold middle of april i become crazy busy and get ich somehow i guess it was dormant i was stillfeeding nori shrimp plankton pellets and doing weekly 20 G water changes

ich took out my entire stock of fish except 2 clowns a diamond goby and a hippo tang


how can i go about introducing new fish again ????
how long can ich stay dormant for?
id have asked sooner but wireless hasnt worked for 2 months and ive been busy to fix it jsut got it back tonight!