DESCRIZIONE
A system (10) for dissolving gas into liquid contained within a body, the system comprising a tubular body (20) extending between a bottom end (26) and a top end (24), a gas diffuser (42) coupleable to a gas source (38) and configured for discharging gas bubbles into the tubular body, and a liquid pump (30) for propelling liquid within the tubular body in a downwards direction, against uprising gas bubbles, where the liquid egresses at the bottom end of the tubular body.