Tem Strickland, Daniel Reyland, Taituha Woller and Culling formed the club's team for the 200m free and 200m individual medley relay, picking up gold and bronze.
Team manager Donna Tumai praised the team's work ethic and the time put in by head coach Stefan Swanepoel.
"Stefan's long hours at the poolside are obviously paying off with our swimmers doing so well," Tumai said.
"He has been great. Obviously the kids do all the hard work, but he is there mentoring them and getting them up to where they need to be. At the end of the day it's their determination and grit that gets them there."
Tumai said the medal haul was an improvement on the previous year, but some of that comes down to geography.
"Last year it was in Invercargill, which needless to say is a long way to go.
"We had a team of four go down and came back with medals, but we came back with a whole heap more this year.
"The kids just blow you away. They make their final in an outside lane as one of the slowest qualifiers, then they win a medal. It's fantastic."
