Novice redstoner trying to add an item sorter onto my guardian farm to collect only prismarine shards, but it gets majorly backed up after a while. Any way I can make the sorting process more efficient?

Here’s some links to what I’m using in this system to familiarize yourself with the issue if needed
Item Sorter Design by ImpulseSV: https://youtu.be/NHjWYCDYJ4s?si=zZYcw6WH6kVYmmBH
Guardian Farm design by DirtGolem: https://youtu.be/X3mCeJmx_k8?si=xmdpClpMWyNe78Qe

by That_Boi_Link