Really annoyed.

[cichlaguapote]

you just dumped in a bunch of extra fish, each producing ammonia. You didn't have enough beneficial bacteria to handle all the ammonia, so it shot through the roof. You are very lucky not to have lost your barramundis! Do water changes immediately!

Good point but I think he means they died in their seperate feeder tank.

Either bad fish or bad water obviously. But this is why I don't like feeding feeders unless I have too. My market shrimp don't need good water quality and won't die by the morning(they're frozen).

 

[Dudzy]

probably ammonia spike. Think about it like this: your tank is properly cycled for the bioload you have now. you just dumped in a bunch of extra fish, each producing ammonia. You didn't have enough beneficial bacteria to handle all the ammonia, so it shot through the roof. You are very lucky not to have lost your barramundis! Do water changes immediately!

This is the first time it's happened though, because I am usually able to hold 80 feeders in my feeder tank.
It must have been bad fish.

 

[Miles]

hyperplasia..

In the summer time, the water is very warm when they are shipped. The feeder fish companies do not change their packaging amounts during the heat waves. The warm water increases metabolism and therefor increase ammonia outpoint during transport. The fish also respire faster and create more Co2 in the bag, causing a more dramatic upward swing in pH when the bag is opened ~ causing a spike in Ammonia toxicity.

This hyperplasia is scaring of the gills and can have long lasting effects, that could take weeks or even months to show the ill fated signs - lethargy, labored breathing, death..

If their gills are already functioning at half capacity and you put them in a feeder tank that would require them to compete for oxygen and/or be exposed to more ammonia, just worsens the situation.


hope that helps bye!

 

[pcfriedrich]

ammonia spike ??

exactly. too many fish for the tank to handle.