Mount Kelly collected three podium finishes, to add to the four they had picked up on the opening evening in Sheffield.
Finlay Middleton won gold in the MC 50m freestyle with a time of 30.24 seconds on Thursday night.
There was a silver medal for team-mate Holly Taylor in the 17 and over 50m freestyle event. She clocked 27.20 seconds.
Henry Dixon also won a silver for the Tavistock-based school. His came in the men’s 17-year-olds’ 100m butterfly with a 57.02 swim. In the same final team-mate Tom Brew came ninth in 58.93.
Dinnaton are enjoying a successful championships. Emily Morgan-Hughes had won a bronze medal for them on the opening day and team-mate Matthew Plumb followed suit on Thursday by taking third in the 15-year-olds’ 50m freestyle in 25.28 seconds.
Club colleague Emily Chapman also reached the 12/13 year-olds’ 100m butterfly final on the second day, where she finished sixth. Plymouth Leander’s Orana Noel was fourth in that race.
Leander did win a medal in the 16-year-olds’ 50m freestyle, with Ethan Rayment claiming silver with a 24.85 second swim.
Todd Price, Ella Bardgett and Lily Parsons also reached finals for Leander, as did Mount Kelly’s Joe Russell.