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Somewhere in the literature citied in this thread - it was a line about "passive infestation" or something like that. The parasite attached to the fish – but not feeding. Logically – if we accept immune carriers without any symptoms (I.e. white spots)– we must accept longer periods on the fish or at least that it could happens. I do not have much experiences of SW ich – but huge experiences of FW ich after working a lot in FW LFS:s In this case – my experiences says that without a dormant, not visible stage on the fish – many of these events of ich is impossible. Total impossible. However – science say something different. I can be wrong but there is a chance that science can be wrong too. Science is not a set up of laws that not will be changed during time, Science change every day after new observations and surprisingly often due to thinking outside the box. There is very few Nobel prize winners that get that price because the think inside the box (exceptions authors and economical theories where this is more or less the rule)
Because of chloroquines lipophilic properties – this is IMO – a huge overdosing – please see this thread It was you that dig up that article that change the game..
Sincerely Lasse
Yes - I agree with you about CP - (I wasn't recommending CP per se) The point was - that in that Article (from the University of FL) - both recommend treating for longer than many here do. 3-6 weeks at MINIMUM (with CP or Copper) - So - while you can probably get away with 14 days 80 90 percent of the time (who knows) - its not what research seems to show. If you look at zoo quarantine policies - after treatment they observe for much longer than 2 weeks. I'm not arguing against @HotRocks or anyone else. I'm just pointing out information from reputable sources that's widely out there.
When people using different protocols - perhaps its not user error or levels or cross contamination - perhaps its a problem with the protocol - (ANY PROTOCOL - Seachems, Seattle Aquarium, or the 10 varieties seen here).