I made a trapdoor for the bait area out of a piece of plastic and hinge. The opening for trapped fish access is a ferrule from a range fan hood and a small bucket lid. Both accesses are held in place by rubber bungee cords bolted to the mesh...

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Here's an old thread with more info on it...

https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=510803


Fish on!,
Noel