I am using spring water because it's much safer for them and I don't like the tap water that much and no I am using Aquaclear Filter
So you guys are saing that he actually sick OMG he never been sick..Poor boy.In Canada ( that where I live) I never found Maracyn ??? The only thing that I have tight now is Bettafix but I heard that is bad for bettas? Is there any signs of that strange desease exsept the breathing? and thanks everyone for your help..Hope he make it through
Placing him in a smaller tank will not make his breathing more comfortable. A small tank will get a build up of waste a lot quicker than a larger one even if filtered.
You should lower the water level in the main tank if he is having difficulty reaching the surface. Or you could place him in a large floating breeding net of the sort you put guppies in.