Hello, I am 29 with CF and have been fighting infection after infection since July. I started to wonder if any one has ever been told that fish tanks are not a good thing to have when you have CF. I have a 100 gallon fish tank and here lately I keep getting sick and haven't been off antibiotics for over 2 weeks straight yet since July. I have had fish tanks for about 5 years but the 100 gallon I have only had for 2 years. I had a server hemoptysis in July and ever since been sick. I had IV's back in October 2 weeks, then a week later cipro, and now I am on Doxycycline. I started thinking maybe my fish tank is causing these illness' but found no information on fish tanks and CF. I have put in a call to my CF Dr to see what he has to say but haven't heard back yet. Does anyone have any advice or maybe an opinion on this? Thank you in advance for any help....... Melissa 29 w/CF