Uh oh!!!! Help!!!

[Annie]

I think the problem is downsizing them from such a big pond to a small tank, which causes stress and because the space is limited, the nitrite and ammonia spiked, produced from waste. Temperature could be a bit too hot too but then I have my common feeder (now a monster size) in a tropical Asian tank but in a 215 gallon. Also, initially when the tank is first set up, the water has be cycled for a month to get the nitrite down.

I hope your 50% water change helps but yes make sure you use tap water conditioner. And when you add the water in, add it high so that it creates bubbles, this elinimates the chlorine from the water too. And yes get a testing kit

As to picking out dead fish, use a fish net.

 

[Angelicarboreals]

I think the problem is downsizing them from such a big pond to a small tank, which causes stress and because the space is limited, the nitrite and ammonia spiked, produced from waste. Temperature could be a bit too hot too but then I have my common feeder (now a monster size) in a tropical Asian tank but in a 215 gallon. Also, initially when the tank is first set up, the water has be cycled for a month to get the nitrite down.

I hope your 50% water change helps but yes make sure you use tap water conditioner. And when you add the water in, add it high so that it creates bubbles, this elinimates the chlorine from the water too. And yes get a testing kit

As to picking out dead fish, use a fish net.

They had been in the tank since May of this year, so I am not sure if "stress" from moving would still apply. Or would it?

Just a quick update, the remaining goldie and the pleco are still alive this morning, the goldie is now swimming around some, instead of floating and breathing labored. I am hoping we are out of the weeds.

 

[birdman78]

They had been in the tank since May of this year, so I am not sure if "stress" from moving would still apply. Or would it?

Just a quick update, the remaining goldie and the pleco are still alive this morning, the goldie is now swimming around some, instead of floating and breathing labored. I am hoping we are out of the weeds.

that's some good news. good job

 

[Annie]

They had been in the tank since May of this year, so I am not sure if "stress" from moving would still apply. Or would it?

In that case it wouldn't be from stress then. Perhaps just nitrite and ammonia spike. But glad you got it sorted out!

 

[ortegah]

Great news!

 

[waterfaller1]

That is awesome. Good job on the water change! I thought you had just moved them. No, more likely as you suspected the heater malfunctioned, causing them to start dieing, in turn harming the others as the ammonia spiked.