livewell help
My livewell has this type over flow,,pvc pipe with a rubber bushing on the bottom to stick in the hole/drain.

My problem is that bigger fish or lots of fish in the livewell knock it out all the time.Does anyone have a better one/better idea on how to"upgrade" this? I know I can put a standard ole boat plug in it but I couldnt run water in it but just one time to fill it up..I am thinking I went on another boat and his had a screw in type drain instead of the push in like mine...Thanks for any input...
HEY,,WATCH THAT YELLOW ROD