Glofish Zebra danio swimming at top of tank

Hi there! First time fish owner here.

So my glofish zebra danio has been swimming in one spot towards the top of the tank for 3 days straight. It was doing fine last week. Its also not as excited about food as the other ones.

There are 6 other zebra danios in there and they are all doing great. I'm wondering if this is something I should be concerned about or not.

Tank is 10 gal, fully cycled
ph 7.6
temp 76
ammonia is below .25, just did a 25% water change today
nitrite 0
nitrate 40

 

How long have you had the fish? Pics?

 

How long have you had the fish? Pics?

I've had the fish for about a month. Heres a pic.

 

A few things,
That’s not a natural shape for a zebra danio. This fish MIGHT be deformed, which is becoming more and more common due to inbreeding. No problem, most fish at this stage with a deformity will go on to live a normal life.

If I zoom in, it looks like his scales are standing up. Can you look at the fish from above and see if he has pineconed?

Could just be the lighting, but is there a white patch on his head?

You’ve only had this fish for a month, so a good number of diseases are still viable. Bacterial or fungal infections can happen at any time, both are always present in a tank and come about from stress. They can also be secondary infections when a fish is weakened by something else. However, at only a month, you could still have internal parasites. Sunken stomach is a sign of internal parasites... though it’s not enough in itself.

Has he been showing white stringy poo?

 

A few things,
That’s not a natural shape for a zebra danio. This fish MIGHT be deformed, which is becoming more and more common due to inbreeding. No problem, most fish at this stage with a deformity will go on to live a normal life.

If I zoom in, it looks like his scales are standing up. Can you look at the fish from above and see if he has pineconed?

Could just be the lighting, but is there a white patch on his head?

You’ve only had this fish for a month, so a good number of diseases are still viable. Bacterial or fungal infections can happen at any time, both are always present in a tank and come about from stress. They can also be secondary infections when a fish is weakened by something else. However, at only a month, you could still have internal parasites. Sunken stomach is a sign of internal parasites... though it’s not enough in itself.

Has he been showing white stringy poo?

They look slightly pineconed imo.

I've noticed a strand or two of white poo in the tank when I've been cleaning it. Not sure if its coming from that one though. I haven't actually seen him poop yet.

Is there anything I should do to treat the entire tank? I've also used the same tools to clean another tank of neon tetras. Should both tanks be treated?

 

They look slightly pineconed imo.

I've noticed a strand or two of white poo in the tank when I've been cleaning it. Not sure if its coming from that one though. I haven't actually seen him poop yet.

Is there anything I should do to treat the entire tank? I've also used the same tools to clean another tank of neon tetras. Should both tanks be treated?

going to refer you to A201 here...

I would suggest a food soak with fenbendazole and garlic, but I'm not too experienced in this regard.

 

The top view appears to show some type of white growth on the back of head. Do the other Danios have a similar white patch?.
If the white patch is unique to the pictured Danio, then my guess is a bacterial infection.

 

The top view appears to show some type of white growth on the back of head. Do the other Danios have a similar white patch?.
If the white patch is unique to the pictured Danio, then my guess is a bacterial infection.

All the glofish danios have that white on the back of their head.