Anybody...?

Today, she tried to swim a little bit but seemed to tire out after a few minutes and went back into her hide. Her breathing seems a bit shallower than usual. I also think I've found 2 nematodes (the thin, squiggly free-swimmers) in the tank. I researched them, and everything I've read says that the kind I found are more of an aesthetic problem than a real health threat. Is this true, or do all nematodes cause lung problems in ACF? If so, could they explain at least some of my ACF's symptoms?