Hyposalinity to speed fallow period?

[Rendgrish]

I'm in the process of fallowing my systems after confirming the presence of ich, and I have a question about using hyposalinity to speed the process. Based on the information posted by @Humblefish hyposalinity can prevent ich eggs from hatching if left at 1.009 for 5 days.
Based on this information, I've been thinking about removing all of the animals from one system (it's less than 2 months old, so there's a Tang and a small cuc), draining out as much water as I can, then replacing it with DI water to crash the salinity down as close as I can to zero.

How long would I need to keep the salinity this low? Would 2 weeks be enough, or should I play it safe and wait the full 30 days normally used for hypo?
Also- does anyone know if moving from salt to fresh water will destroy the bio filter? That's less important, but it might be good to watch for.

 

[F i s h y]

Does this kill the Ich or does this put it in an encysted dormant phase? I don't know for sure.

 

[Big G]

There's no way to know for sure if that would kill all of the Ich. All it would take is just one to survive. Yikes!
After taking all that out and dosing freshwater it would reduce the "good bacteria" for sure. But the bacteria is pretty resilient.

 

[Jasonbuckley011]

I'm in the process of fallowing my systems after confirming the presence of ich, and I have a question about using hyposalinity to speed the process. Based on the information posted by @Humblefish hyposalinity can prevent ich eggs from hatching if left at 1.009 for 5 days.
Based on this information, I've been thinking about removing all of the animals from one system (it's less than 2 months old, so there's a Tang and a small cuc), draining out as much water as I can, then replacing it with DI water to crash the salinity down as close as I can to zero.

How long would I need to keep the salinity this low? Would 2 weeks be enough, or should I play it safe and wait the full 30 days normally used for hypo?
Also- does anyone know if moving from salt to fresh water will destroy the bio filter? That's less important, but it might be good to watch for.

I been thinking about doing the same thing due to Ich outbreak in my tank. Did you ever replace you saltwater with freshwater? If so did it work?

 

[Rendgrish]

I did replace all the water with fresh water, I'm waiting a full month just to be certain all the ich is gone, so I can't comment on the success yet. One thing I still need to do is stir up the substrate some to make sure there isn't a pocket with higher salinity. Probably over kill, but better safe than sorry and having to start over..

 

[Hugh Mann]

Everything I have ever read about ich tells me that if eradication is your goal, going nuclear is the only viable option.

I can't say whether or not hypo salinity will just make the tomonts go dormant or kill them, but definitely also raise the temperature to I believe it is 82F to quicken their life cycle time.

I read just the other day about a person who had two failed fallow periods for ich, and that an outbreak conviently occurred shortly after vacuuming the sand, so it's definitely worth stirring around at the very least. I'd suggest removing as much as you can and rinsing the heck out of it just to be sure. Gives your sand a good cleaning too.