Celestial Pearl Danio Staying At Water Surface

So this is my first time I have really felt a need to post one of my questions on a forum. I’ll start by describing my tank. It is a high tech 20 gallon densely planted tank stocked with a few amano shrimp and 11 celestial pearl danios newly added from a quarantine tank. I took the acclimation slowly with a drip because of the lower ph from the ADA Aquasoil. Most of them seem to have adjusted just fine while 2 are staying near the surface. One of the 2 is breathing heavily and I don’t know why. I immediately checked water chemistry and everything is fine. 0 ammonia and nitrite and 10 to 20 nitrate. Anyone have any thoughts?

Here’s a picture of the tank


And here’s a picture of the one breathing heavier


I couldn’t get a picture at the surface because she would go lower when I get close to the tank

 

Maybe it's not getting enough oxygen.

 

I thought the same thing and have turned off the co2. It is more active and seems to be looking better as well. Thank you!

 

It’s now breathing better but still seems to be swimming pointing upward on an angle. It’s like it’s tail is going down and she appears to have an almost concave belly compared to the others, are there any other answers out there?

 

I’ve turned the heater down to see if that helps at all.

 

What's your temperature? CPD are normally okay at room temperature, but they like their oxygen and this has been an especially warm summer. I'm thinking the combination of hot water and CO2 brought the oxygen levels too low. I'd recommend adding an air stone and setting the heater to 21 C / 70 F.

 

It was previously at 77 so I’ve put the heater much lower, as for the air stone, I already have a lot of water surface agitation from the filter. I’m going to try to get it around 74.

 

Rye, there isn't much you can do.
The caving belly and these issues seem to often be seen nowadays.

I quit with CPD's cause of this, adopted some of my son (who had the same issuee) and those are doing great.

I once read they were prone to TB.
Again I suspect a viral issue in these fish.
Bloating is another issue btw

 

What kind of surface agitation do you have? CO2 injection is tolerated by livestock better if there is more surface agitation and therefore more dissolved oxygen as well.

 

A marine land penguin filter is what I use.

 

Rye, there isn't much you can do.
The caving belly and these issues seem to often be seen nowadays.

I quit with CPD's cause of this, adopted some of my son (who had the same issuee) and those are doing great.

I once read they were prone to TB.
Again I suspect a viral issue in these fish.
Bloating is another issue btw

So do I just have to wait and hope for her to stick it out? Are some CPDs just weak stock? Thank you for helping.

 

So do I just have to wait and hope for her to stick it out? Are some CPDs just weak stock? Thank you for helping.

I am member of several forums for years now. CPD issues have been at all of them.
Even on FL.earlier !!!

A shame cause they're really nice fish.
It isn't exactly clear what is causing this.

 

I euthanised fish like this. Sorry

 

Thanks for helping. At least all the others look great.

 

I disagree with the euthanasia advice. Fish who experience low oxygen conditions and mild CO2 intoxication usually recover with improved oxygenation. I happen to have experience with both this issue and fish TB, and I see no reason to suspect the latter in this case. I also breed CPDs and don't find them to be especially fragile. That being said, I consider air stones to be a must in any tank that has high CO2 content, either due to injection or just overstocking. If you notice more fish showing dyspnea and/or piping, this would be the next logical step.

 

Well she’s still hanging on, today I think she took a small bite or two of some food.