[lildark185]

Allergies? LOL. The other four angels have been doing fine in the planted tank since their first introduction with the exception of that one? I'd think it were the single fish itself rather than anything with the tank if the other ones are fine.

 

[lildark185]

It has nothing to do with CO2 since the other angels are doing perfectly fine. There is probably a defect in the angel and should be kept in the QT if you want it to live. Survival of the fittest.