I've had ich in my tank since I set it up in 2010. I monitor it, albeit passively (oh hey, fishy #3 has some spots on him, hmm...interesting). I use ick to monitor stress levels in my fish, which is mostly feed related (they're pigs). New additions get quarantined but its not ick I'm concerned about. My lavender tang is a carrier, he has it all the time while it comes and goes on other fish and is never seen on others.
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Christy's Reef Blog
My 180 Build
Every electronic component is shipped with smoke stored deep inside.... only a real genius can find a way to set it free.
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