HOW IS THE INFECTION TRANSMITTED: The fish tank water contains micro-organisms from which the bacteria can be transmitted. The bacteria can also be transmitted from the spa water if the same water is used for more than one customer. If a person who is infected with HIV and/or Hepatitis (blood-borne viruses) bleeds in the water and the same water is used for another person, it can spread the infection. A growing number of these spas has lead the government to spread awareness about its potential risks.