In the end if it is ich do whatever you're comfortable with and what keeps your sleeping at night but I'd guess at least 90% of hobbyists live with ich in their tanks. It's not really much of a threat and deaths that result likely stem from other stresses, often from inexperience or poor water conditions. If you're that worried about it get yourself a good UV sterilizer and run it intermittently when ich spots first appear, it won't illuminate the ich but it will prevent large outbreaks which is the main concern.
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