1st dead fish

[Mrfishypants]

It's a cory don't know why water tests show everything fine my danios are swimming at the top with mouths to water surface and corys have rapid gill movements both not eating much worried there going to die

 

[Mrc8858]

Was the tank properly cycled

 

[LyndaB]

It's a cory don't know why water tests show everything fine my danios are swimming at the top with mouths to water surface and corys have rapid gill movements both not eating much worried there going to die

It sounds like they have no oxygen.

Add an airstone to increase oxygenation. Also, as asked above, is the tank cycled? How long has the tank been set up?

What are your readings for ammonia, nitrite and nitrate? What is the temp? What is the pH?

Which test kit are you using?

 

[Mrfishypants]

Tank fully cycled api master test kit all zero ph7.4

 

[LyndaB]

You should have a nitrate reading. Why is it 0?

 

[Mrfishypants]

Just over zero then

 

[LyndaB]

What size tank? What do you have in it? How long has tank been up?

 

[Mrfishypants]

Been cycled for 7 weeks 20 g 6 danios 4 corys well 3 now it's been fine till now