system 1 filter warning

[MartinOsirus]

Be careful about using a system 1 diatom filter (don't) on smaller - like 20
gal
tanks. The excessive flow creates a crurrent that stirs up the gravel bed and
releases dissoved organic compounds that kills the fish. This is what happened
to me. There is no warning I'm aware of that comes with the filter.

[Dinky]

"MartinOsirus" > wrote in message
...
>
> Be careful about using a system 1 diatom filter (don't) on smaller - like
20
> gal
> tanks. The excessive flow creates a crurrent that stirs up the gravel bed
and
> releases dissoved organic compounds that kills the fish. This is what
happened
> to me. There is no warning I'm aware of that comes with the filter.

I seriously doubt that the problem is as you have observed. Either there was
a pre-existing problem in your tank that the filter stirred up, or you
released some diatom powder into the water column which *can* kill fish. I
stir up the sub on my tanks all the time, and it does not cause fish death.


Or is this a troll?

billy
troll in training, just you wait.

[NetMax]

"MartinOsirus" > wrote in message
...
>
> Be careful about using a system 1 diatom filter (don't) on smaller -
like 20
> gal
> tanks. The excessive flow creates a crurrent that stirs up the gravel
bed and
> releases dissoved organic compounds that kills the fish. This is what
happened
> to me. There is no warning I'm aware of that comes with the filter.

If excessive turbulence was the catalyst to release sulphide gases
trapped in the substrate (it wouldn't be DOCs which would kill quickly),
then wouldn't your advice be applicable to any pump or filter?

If this happened the way you described, then there would have to be
considerable detritus left in a rotting state for a significant amount of
time. This points to maintenance issues.

My understanding is that a diatom filter is a poor choice when there is a
lot of particulate matter, as it clogs the diatomite too quickly. This
filter is a water polisher, but the fatal combination seems to have
happened when it upset the rotting detritus in the gravel. This
occurrence might not be realistic to warn against. I apologise if I'm
mis-reading your post.

NetMax

[MartinOsirus]

>From: "NetMax"
>Date: 3/15/2004 10:51 PM Central Standard Time
>Message-id: >
>
>
>"MartinOsirus" > wrote in message
...
>>
>> Be careful about using a system 1 diatom filter (don't) on smaller -
>like 20
>> gal
>> tanks. The excessive flow creates a crurrent that stirs up the gravel
>bed and
>> releases dissoved organic compounds that kills the fish. This is what
>happened
>> to me. There is no warning I'm aware of that comes with the filter.
>
>If excessive turbulence was the catalyst to release sulphide gases
>trapped in the substrate (it wouldn't be DOCs which would kill quickly),
>then wouldn't your advice be applicable to any pump or filter?
>
>If this happened the way you described, then there would have to be
>considerable detritus left in a rotting state for a significant amount of
>time. This points to maintenance issues.
>
>My understanding is that a diatom filter is a poor choice when there is a
>lot of particulate matter, as it clogs the diatomite too quickly. This
>filter is a water polisher, but the fatal combination seems to have
>happened when it upset the rotting detritus in the gravel. This
>occurrence might not be realistic to warn against. I apologise if I'm
>mis-reading your post

The main issue it seems is the high pressure filter, with a high outflow -
being used in a small tank(20 G). The tank was quite stable and well maintained
- but the tremendous current produced - must have released DOC and maybe
sulfide gases. The fish started dying 24 hours later and 1 died each day after
until all 9 barbs were gone. I don't think this filter is meant to be used in
smaller tanks. The water was quite clear to start - but I was trying out this
new filter - to see if it would "polish " the water even more.

[NetMax]

"MartinOsirus" > wrote in message
...
> >From: "NetMax"
> >Date: 3/15/2004 10:51 PM Central Standard Time
> >Message-id: >
> >
> >
> >"MartinOsirus" > wrote in message
> ...
> >>
> >> Be careful about using a system 1 diatom filter (don't) on smaller -
> >like 20
> >> gal
> >> tanks. The excessive flow creates a crurrent that stirs up the
gravel
> >bed and
> >> releases dissoved organic compounds that kills the fish. This is
what
> >happened
> >> to me. There is no warning I'm aware of that comes with the filter.
> >
> >If excessive turbulence was the catalyst to release sulphide gases
> >trapped in the substrate (it wouldn't be DOCs which would kill
quickly),
> >then wouldn't your advice be applicable to any pump or filter?
> >
> >If this happened the way you described, then there would have to be
> >considerable detritus left in a rotting state for a significant amount
of
> >time. This points to maintenance issues.
> >
> >My understanding is that a diatom filter is a poor choice when there
is a
> >lot of particulate matter, as it clogs the diatomite too quickly.
This
> >filter is a water polisher, but the fatal combination seems to have
> >happened when it upset the rotting detritus in the gravel. This
> >occurrence might not be realistic to warn against. I apologise if
I'm
> >mis-reading your post
>
> The main issue it seems is the high pressure filter, with a high
outflow -
> being used in a small tank(20 G). The tank was quite stable and well
maintained
> - but the tremendous current produced - must have released DOC and
maybe
> sulfide gases. The fish started dying 24 hours later and 1 died each
day after
> until all 9 barbs were gone. I don't think this filter is meant to be
used in
> smaller tanks. The water was quite clear to start - but I was trying
out this
> new filter - to see if it would "polish " the water even more.

Sorry for your losses. I'm not familiar enough with the System 1 filter
to be aware of their promotion material or tank recommendations.

NetMax