Anaseini Nagera celebrated her recent squad promotion by winning six golds, with her best result in the 200m breaststroke.
Fellow squad member Jack Weston has continued his great from from last year with six golds from the meet.
Johnson said Weston's effort in the 200m breaststroke and 200m medley was superb.
Paddy Baylis stole the show in the boys' 12-year-old age group when he won the 200m and 400m medley, Johnson said.
In the younger age groups, Milla Theobald showed great determination to win six gold in the girls 9-year-old age group, with her best effort coming in the 50m butterfly.
Johnson said 10-year-old Jacob Stubbing gave fantastic efforts in his events, especially in the 200m individual medley.
The youngster took victories in the 100m butterfly, 200m freestyle and 100m freestyle.
Also displaying significant improvements were David Boles (400m medley) and Joape Nagera (50m freestyle).
"This was an excellent first meet of 2013. Despite most of the team currently enjoying additional training loads, it was great to see solid improvements in both technique and endurance across the board," Johnson said.
"We are definitely progressing as a team and everyone is really excited about racing fast later in the season."