Tetras

[bnpleco]

I woke up yesterday to find a neon dead on the gravel then las night I saw one of my cardinals over in a top corner twitching he is doing the same today so I isolated him. Any advice will it kill all my school?

Neon tetras 7
Cardnal tetras (including sick) 8
They school together

Ammonia 0
Nitrite 0
Nitrate 10

 

[bnpleco]

I have lost four now can somebody help me!!!

 

[shellieca]

What size tank? How long has it been set up? How long have you had the fish? Any of them added recently? Are you testing with strips or liquid test kit? Tank temp?

 

[bnpleco]

What size tank? How long has it been set up? How long have you had the fish? Any of them added recently? Are you testing with strips or liquid test kit? Tank temp?

20 gallons long
About 6 months
Neons 3 months cardinals 2 weeks
Liquid test 80 degrees
Any ideas

 

[bnpleco]

Help!!!!

 

[Aquarium Girl]

I don't keep tropicals, but are there any visible signs of disease? Do you have a QT?

 

[butterfly_koi]

When printed in black and white its hard to diagnose sickness because everything seems to be ok level wise.
How long has it been since you've changed the water last. Often times good clean water can help with a number of things.