Welcome to AA, angelsflying! [/center:c21b6814e5]
First a couple of overall tank care tips:
~Get liquid tests for ammonia, nitrite and nitrate. The strips are unreliable.
~You are cleaning your filter too much, IMO
. How are you cleaning your filter weekly?
Now, for your fish problems:
~What are your tank parameters (ammonia, nitrites, nitrates, temp)?
~When is the last time you did a water change and vacuum the gravel? How often do you do this? How much water do you remove at a time?
~How long have you had the fish?
~How long has the tank been set up?
~Have you added anything new to the tank--decor, new dechlor, new substrate, etc.?
Here are some diagnostic charts to get started:
I do not suspect lack of oxygen, because that should affect the whole tank and all the fish would be at the top of the tank and not moving very much. It could be a swim bladder disorder.