Fish tanks and Legionella risk?

I work in a skilled nursing facility and we just placed a 50 gallon fish tank in the center of the building. What risk factors, if any, should we be aware of concerning Legionnaires’ disease and how can we minimize the risk? Thank You


The mode of transmission of Legionella is aspiration (which requires drinking water) or aerosolisation. A fish tank would not easily fulfill these 2 conditions, so it would carry minimal or no risk of contracting Legionnaires’ disease.