Help Avi!
 

My betta fish, Avi, hasn't been acting like himself lately. He used to swim all around his tank, but now he usually just sits at the bottom of the tank, sort of burrowed into the plants. He still loves to eat and for food he will swim up to the top, but then he'll slowly drift to the bottom again.

He does look as though he's lost a little coloring, especially in his face and near his gills.

Does anyone know what's wrong with him?

hello and welcome.
in order for people to be able to help you,please could you
give us a little more information. :)
how big is his tank,is it heated and if so how hot is it.
how do you clean his tank.
how long have you had him for.
:)