"No CPR was required and we are happy to report the child was doing well and was taken to hospital for observation."
A St John spokesman said the child was taken by ambulance to Waitakere Hospital in a moderate condition.
Dennis said the quick actions of the pool staff prevented what could have been a tragic incident.
"It is an important reminder that all children should be within arm's reach of a parent or caregiver when around water."
Water Safety regulations set out on Parakai Springs' website instruct that any child under 8 must be actively supervised by an adult, 16 or older, at all times while in the water or in the complex.
It follows an incident in March last year, when a 4-year-old was saved by two off-duty nurses at Parakai Springs.
The nurses, along with pool lifeguards, performed CPR on the boy after he was pulled from one of the centre's pools and lost consciousness.
Two months earlier, on January 15, a 7-year-old boy was rushed to Starship Hospital after being found unresponsive at the bottom of a pool at the nearby Palm Springs Thermal Pool in Parakai. He died in hospital the following day.