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Silver arowana die after 3 years

headbanger_jib

headbanger_jib

Doomsday Device
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I have been keepin a large group of arowana in a pond.

I have asian arowana as well as silver arowana.

I started with 11 arowana that were grown by me from 6-8" size to 18" before they were moved to the pond.

Among the 11 specimens, 5 were an year older than the other 6.

I have seen a worrying scenario occurring, in the group a single specimen of silver arowana will suddenly stop eating and start staying in a corner of the pond, they go on like this for a few weeks and then eventually die.

This I have seen only happen with silver arowana that have reached 3 years plus of age.

I have asian arowana that are older than 4.5 years and are healthy.

Another issue I saw was with 2 year old albino silver arowana, after they reach a size of 18-20" they develop swim bladder issue, they swim around in a laboured way and then eventually die.

Another very unique thing I observed was they push their heads out of th water once in a while.
 
Sad post to read for sure. I offer my comforts on your loss. Is this an overstock issue with nitrates getting too high, and causing a gulp of air? Also seems to me there is an aggression issue. Particularly in the defensive cornering. When different species are united, the outcome cannot be speculated.
 
Chino 61 said:
Sad post to read for sure. I offer my comforts on your loss. Is this an overstock issue with nitrates getting too high, and causing a gulp of air? Also seems to me there is an aggression issue. Particularly in the defensive cornering. When different species are united, the outcome cannot be speculated.
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There's very little aggression as this is a large pond, and the fish that die have no visible damage.

My nitrates are less than 20ppm
 
Is this pond outdoors? If it is, the arowanas might be eating the animals that end up in it, get the parasites those animals were carrying, and eventually die.
 
MultipleTankSyndrome said:
Is this pond outdoors? If it is, the arowanas might be eating the animals that end up in it, get the parasites those animals were carrying, and eventually die.
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I live in a city
I have a garden in my home and the pond is in the garden.

The only thing they eat that's not offered is dragonflies
 
I see. It doesn't seem likely that it's parasites, then, in which case I'm as stumped as you are.
 
I have kept a good diet
Tilapia fillet that is supplemented with Boyd's vitachem freshwater
Super worms gutt loaded on carrots/hikari massivore, hikari cichlid gold
Roaches gutt loaded on carrots
Macrobrachium shrimp

Only the insects are fed live, which are cultured by myself.

Everything else is frozen for atleast 72 hours before being fed
 
Very strange and frustrating for you I am sure. Seems like something doesn't agree with their metabolism but doesn't bother the asians water chemistry or diet hard to tell.
 
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