This morning I noticed one of our 2 mollies was plastered to the filter intake. I thought she was dead, but then she gave a little gulp. I gently pushed her away and she detached and started swimming...a bit unsteadily, but now she seems fine. Strange. She hasn't seemed ill or lethargic...but she is the fish that suffered pretty severely from ammonia and/or nitrite poisoning when the tank was cycling about about a month and a half ago. Is this uncommon? Should I worry about her health? The tank is a 10 gallon and the filter is an appropriate size. I need to re-check water parameters this morning so I'm not sure what those are right now. Thoughts?