Hi ppl
* * * * * * * *i have a 4ft tank with two filters going at the same time creating a cicular current with lots of surface turbulence, its an established tank, water parameters good, the gas exchanges are/must be good as it has quite a current in the tank, but i have goldfish at the surface that appear to be taking in extra air, is this normal for goldfish as i have looked up all possible causes ,i.e ammonia,airation, etc the tank has none of the symptoms with fish gasping ,, what else could it be or is it just a goldfish thing

* * * * * * * * * * * * * * * * * * * *THanks Sasha