Having claimed four podium places on the first day, Plymouth won six medals on Saturday.
There was a golds for Zachery Anderson and Alfie Brown.
Anderson triumphed in the boys’ E/D three-metre final, while Brown won the boys’ B one-metre event, with team-mate Aidan Heslop winning bronze in the same competition.
There was a silver medal for Euan McCabe in the boys’ C platform and for Brown and Kayleigh Sinclair in the pairs’ event, while Evangeline Piper took bronze in the girls’ C one-metre final.
The competition concludes on Sunday.