20lb too thin for beach/river

pretty good gear that sensor,would of thought 20lb with a shockleader would be ample for beach/river use.When your start stepping up to 30lb/40lb mainlines they are normally for ruff ground/kelp fishing n not general beach use.
Plenty of good mono's about these day's,blue marlin,suffix,asso,veal's varivas are all tried n tested mono's.All the best with it pal