Ich has not shows on Any fish in maintank for 2 weeks ~I would strongly urge you to avoid the regal angelfish. They are very delicate. If you do get one, you need to see it eat well at the store before you buy it and then quarantine it well using the process outlined here:
Current Quarantine Protocol
2023 Quarantine Procedures Jay Hemdal David Scarborough Protozoans (Cryptocaryon/ich, Amyloodinium/velvet) and Metazoan trematodes/flukes are by far the most common parasites found on newly acquired fish. A carefully managed quarantine process can effectively eliminate these parasites before...www.reef2reef.com
Jay
i consider the fallow period succesful with 45 days.