Anyway, I am assuming my choice and will assume the consequences. I am still thinking immune system is better than a sterile environment. My tank is not on a lab where all can be managed in a proper way (apparently). I am pretty sure doing everything good to eradicate but still make a mistake will stress me out too and discourage me more. I think in US, some vendors may have a proper quarantined setup to help you on this path. I think it is all or nothing, if you go on ich eradication, it is from beginning on rock (if live), sand (if live), coral, invertebrate, fish, plug...