All marine fish dead over night! WHY???
a900...@unet.univie.ac.at
A friend of mine has experienced a major disaster concerning his marine
aquarium. He has been owning a marine aquarium for quite a long time, and
when it became too small for his beloved fish, he bought a bigger one and
did everything to prepare it for the fish (that's what he says, at least).
Weeks later he put in one fish as an experiment to see if it survives.
After some days this brave fish was alive (and a bit bored, however), so
he decided to put in the other fish and his expensive plants.
The next morning, when he looked after his aquarium, he was near a
nervous breakdown, 'cause all his fish were dead, so were some of his
plants and his starfish which had even desolved to macerated looking pieces!
This friend is inquisitive enough to try to find out the reason for this
disaster. I know that the Oxygen level was o.k. I don't know the values for
the electrolytes (wouldn't be a problem to find out). His suspicions are
Bisphenol-A-Diglycidylether, aliphatic and cycloaliphatic amines and some
other wild guesses.
If any of you has got an idea why it was possible that these marine fish
died over night, then please write to me.
Wolfgang Hagen
a900...@unet.univie.ac.at
pRpLe
a900...@unet.univie.ac.at wrote:
: A friend of mine has experienced a major disaster concerning his marine
: aquarium. He has been owning a marine aquarium for quite a long time, and
: when it became too small for his beloved fish, he bought a bigger one and
: did everything to prepare it for the fish (that's what he says, at least).
: Weeks later he put in one fish as an experiment to see if it survives.
: After some days this brave fish was alive (and a bit bored, however), so
: he decided to put in the other fish and his expensive plants.
: The next morning, when he looked after his aquarium, he was near a
: nervous breakdown, 'cause all his fish were dead, so were some of his
: plants and his starfish which had even desolved to macerated looking pieces!
UUUUUHM...Why would he put plants in a marine tank? Last I knew, that
didn't work...something about plants and saltwater (I could be wrong,
time are changing after-all). Hmm..
Rob
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John Shotton
> Weeks later he put in one fish as an experiment to see if it survives.
> After some days this brave fish was alive (and a bit bored, however), so
> he decided to put in the other fish and his expensive plants.
>
> The next morning, when he looked after his aquarium, he was near a
> nervous breakdown, 'cause all his fish were dead, so were some of his
> plants and his starfish which had even desolved to macerated looking pieces!
>
The nitrification bacteria grow to meet the load. You always go into
overload, and hence build up ammonia/nitrite levels when you add any fish.
The degree of overload is the number of fish added to the number already
present (assuming the nitrification had stabalised) taking into account
sizes of the fish.
So adding a lot of fish to a tank matured on one fish would cause massive
overload and very high ammonia/nitrite levels
Always build up stocking levels slowly, or transfer some filter media (and
hence nitrifying bacteria) from the old tank at the same time as the fish
--
John Shotton
Howard Homler
On 16 Sep 1996 12:44:12 GMT, a900...@unet.univie.ac.at () wrote:
>A friend of mine has experienced a major disaster concerning his marine
>aquarium. He has been owning a marine aquarium for quite a long time, and
>when it became too small for his beloved fish, he bought a bigger one and
>did everything to prepare it for the fish (that's what he says, at least).
>Weeks later he put in one fish as an experiment to see if it survives.
>After some days this brave fish was alive (and a bit bored, however), so
>he decided to put in the other fish and his expensive plants.
>
>The next morning, when he looked after his aquarium, he was near a
>nervous breakdown, 'cause all his fish were dead, so were some of his
>plants and his starfish which had even desolved to macerated looking pieces!
>
>This friend is inquisitive enough to try to find out the reason for this
>disaster. I know that the Oxygen level was o.k. I don't know the values for
>the electrolytes (wouldn't be a problem to find out). His suspicions are
>Bisphenol-A-Diglycidylether, aliphatic and cycloaliphatic amines and some
>other wild guesses.
>
>If any of you has got an idea why it was possible that these marine fish
>died over night, then please write to me.
>
>Wolfgang Hagen
>a900...@unet.univie.ac.at
Generally speaking, there may be other factors involved. It helps to
have a close check of ammonia, pH, nitrates, nitrites, as well as
salinity. The type of fish, and change in bioload can also be a big
factor. The ability of a bigger tank to support a large number of
organisms may also be dependent on the quality of it's biologic
filtration, which takes 1-2 months to mature... Many different
potential factors, but we've all been there! H2
james denning
email me if you have on laying around give a cichlid some room!
at...@worldonline.nl
7621...@COMPUSERVE.COM (Howard Homler) schrijft:
Dear Wolfgang (& unlucky/-carefull friend) ,
The answer to the question/situation u posed, is probably really quite simple:
Ammonia!
Of course we have no idea of how many fish, plants/corals, etc, u were talking about.
Generally a marine system needs (beside a tank) a proper bio-filter, proteine-skimmer and a main pump that's of sufficient capacity.
The bio-filter contains bacteria, whether u put them in there or not...
When u put in a fish in the system, the fish + fishfood will produce "garbage" which is food for the filter. The (bacteria in the) filter however can only "eat" a certain amount of this garbage.
The waste contains usually lots of proteins, which will be transformed by different kinds of bacteria into 1) Ammonia then 2) nitrite (NO2) and finally 3) Nitrate (NO3)
The bacteria can usually cope with the waste of one fish. If after a while u put in another one, the bacteria will reproduce in balance with the amount of waste 'offered'.
If however u put in too many animals (and therefor extra excrements), then the bacteria cannot 'destroy' the waste quickly enough and the ammonia-concentration will rise to a level that may kill all the fish, some of the invertebrates, plants and even a lot of the desired bacteria!
In short: this is probably the reason for your (friend's) problem;
If u need more info or would like to discuss details/systems etc. then u can mail me.
at...@worldonline.nl
Arno Klumpers; A T O L Marine Life ; your symbiotic partner in marine aquaristics