A pedicure, manicure, and massage spa water treatment system is described. The treatment system provides a container for containing spa treatment water and multiple fish, a spa water treatment container having a first spa water treatment section hydraulically connected to the container and a second spa water treatment section hydraulically connected to both the container and the first spa water treatment section, and a carbon reactor device. The spa treatment water hydraulically and sequentially flows from the container to the first spa water treatment section, to the second spa water treatment section, and subsequently to the container. An inlet of the carbon reactor device is in hydraulic communication with the first spa water treatment section and an outlet of the carbon reactor device being in hydraulic communication with the second spa water treatment section. Only a portion of the filtered spa treatment water contacts the carbon reactor device.