10 Gallon Tank All of my fish died today

[MossMark]

I just found out that all of my neon tetras had died. There were 4 of them being quarantined in a 10 gallon tank. They had been getting treatment for Ich, and the night before I had just done a water change following the directions on the medication I was using. They had still been eating and weren’t aggresive towards one another. Water parameters were completely fine with no ammonia spikes, temperature was 75° F. I had also dosed the Ich medication with API Stress Coat+. Could the Ich have killed them all at the same time? Should I not have preformed a water change? Is using Stress Coat with medication unsafe? Please help me figure out what went wrong.

 

[StarGirl]

Was the water you put in the same temp as the tank? Big temp swings can kill small fish. Neons are not known to be the hardiest of fish either sadly.

 

[MossMark]

Was the water you put in the same temp as the tank? Big temp swings can kill small fish. Neons are not known to be the hardiest of fish either sadly.

Thanks for the reply. I always try to match the temp as best as I can with a thermometer, and the water I was adding in was a degree cooler. Could that still have stressed them out?

 

[StarGirl]

No it shouldn't. It is strange for them all to die at one time though. You added dechlor that shouldnt have mattered. Musta just been a bunk batch?

 

[CrackerboxPalace]

Any chance of a sudden contamination from your water source? like copper or something from rusty pipes. This is known to kill fish in large enough doses.

 

[MossMark]

No it shouldn't. It is strange for them all to die at one time though. You added dechlor that shouldnt have mattered. Musta just been a bunk batch?

Yes, it’s a bummer because their Ich symptoms were just starting to decrease. Maybe the water change paired with the Ich was just too stressful for them to handle. Thanks for the advice.

Any chance of a sudden contamination from your water source? like copper or something from rusty pipes. This is known to kill fish in large enough doses.

That could definitely be a possibility. Is there any way to test for this?

 

[StarGirl]

Yes, it’s a bummer because their Ich symptoms were just starting to decrease. Maybe the water change paired with the Ich was just too stressful for them to handle. Thanks for the advice.

That could definitely be a possibility. Is there any way to test for this?

I love the way Neons look, one of my favorites. Maybe you can find some Cardinal Tetras? They have the same flashy good looks but IMO a lot more hardy. I have had way better luck with them. They do get a tad bigger though.

 

[CrackerboxPalace]

Yes, it’s a bummer because their Ich symptoms were just starting to decrease. Maybe the water change paired with the Ich was just too stressful for them to handle. Thanks for the advice.

That could definitely be a possibility. Is there any way to test for this?

There is a copper test kit you can get, but if there's rusty pipes, chances are you'll see little pieces of rust coming through your tap. Could be another contaminant either, check the local news, or info from your local water grid if possible.