Your QT was connected to the main tank? how can water from the main tank get into the QT? that should not happen because it will recontaminate the QT and thus the fish. Same way if you put your hands in the main tank and then back into the QT you run the risk of contaminating the fish again.
Hyposalinity work but it must be constantly at 1.009, and if your instrument is out of wack, only one degree can make a difference.
I used hypo a few times and it always worked for me at 100%.
It is imperative to monitor the tank for evaporation so that salinity does not goes yo yo and rise over 1.010.
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Originally Posted by asylumdown
yep, that's correct, What I'm saying is that after they had been in hypo for almost 6 weeks (I was extending the hypo period longer so that I could also dose Paraguard in conjunction with hypo at the end), they got ich again. The tang developed spots of ich out of the blue while the salinity was still down in the 1.010 range, after not having had any at all since a few days after the hypo treatment began. So either there was contamination from the DT, which hadn't been fallowed long enough, or the ich had stuck around in the QT system for all that time even with a hypo conditions and the addition of paraguard, or both.
In either case, for me it failed, but there are a bunch of reasons why that could have happened and is not necessarily a problem with the method per se. However, the more reading I do on the interwebs about it, the less I think it's a method that can truly eradicate the parasite for good.
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