Re: [APD] Ich and planted tanks

["S. Hieber" <shieber at yahoo_com>]

It might not be hogwash, it might only be an incomlete
explanation ;-) . That the stuff seems often to be
persistent at low levels is an oft reported phenomena.
Those reports are sometimes pooh-poohed with the claim that
ich can't survive in dormancy. Perhaps yet another partial
picture. 

Last I heard, it doesn't spring from the air. So unless one
introduces it to an aquarium by contact with a contaminated
net or fish, etc., then it will only show up in a tank
where it already exists.

I imagine in a pubic aquarium, the heating cost is
outweighed by the medicinal cost of treating every very
large amounts of water. That might factor into the choice
of treatment as well as the other choices one can make
about ich.

sh

--- Liz Wilhite <satirica at gmail_com> wrote:

> On 8/1/05, Thomas Barr <tcbiii at yahoo_com> wrote: 
> > 
> > Ich is controlled by public aquariums by raising the
> temp to about 90F.
> > I've never had a ich issue in a planted tank, I've even
> added fish that 
> > had ich only to watch it disappear a week or so later
> of being in good 
> > conditions........
> 
>  Then, according to research, you likely still had ich in
> the tank but it 
> wasn't visible on your fish. The parasite was most likely
> on the gills of 
> the fish and unseen. I have read a heckuva lot of
> research since finding ich 
> on a few fish. The outbreak didn't make sense since it
> ocurred more than 4 
> months after the last fish had been added. According to
> biologists who have 
> done controlled studies of ich, the parasite can exist in
> low levels 
> infecting the gills of fish for extended periods of time.
> There is no 
> "dormant" stage in which it exists without a fish host.
> The parasites appear 
> to much more common than is realized. It is also not
> clear why populations 
> of ich can suddenly explode. In the hobby it is common to
> blame the hobbyist 
> -- fish stress from hobbyists errors or neglect. That's
> likely hogwash, too. 
> It is true that ich outbreaks are much more commonly
> found in tanks with 
> poor water quality, but outbreaks can happen in tanks
> with ideal water 
> quality, too.
>  Liz
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