The invention relates to a device (100) for generating micro bubbles in a hydrotherapy system, said device (100) comprising a first pump (110) comprising a multistage pumping unit (111) and a motor (112) operatively connected thereto, at least one intake pipe (120) intended to be connected to a water supply, at least one discharge pipe (130) intended to be connected to a tub (200) of a hydrotherapy system. The device (100) also comprises a second pump (140) configured to generate an air flow, a supply conduit (141) for supplying said air flow, wherein said supply conduit (141) is connected at one end to an outlet of the pump (140) and at the opposite end to a first stage (111a) of said multistage pumping unit (111) of said first pump (110), said first stage (111a) featuring a minimum head within the multistage pumping unit (111). The invention also relates to a hydrotherapy system comprising the device above and a tank connected thereto through at least one intake pipe and one discharge pipe.
