Did you ever see the guy there slaying the Cats on Catalpa worms? Don't know who he was, but he caught lots of fish.
If it was a young guy, I know who it was....

Catalpa worms were all over a field near where I lived in Cincinnati, and I never heard of them until moving down there. Brought them up to the Cleveland area quite a bit and had a field day at the hatchery and area metroparks lakes (including flatties in Baldwin when it was a lake) on those worms. Also brought helgramites to the area (bought from Cinci bait stores) and had fun with the creek smallies.
The hatchery has a lot of memories, since it was one of the only places to consistently catch trout back then (Metroparks stocking was still in it's infancy - dump a ton of trout in one place, fished out a few days later). I learned the trout finesse game there, long rod, 2lb test line, small hook with a single maggot. Once the trout stocking in the rocky improved (weekly seeding replaced dumping) and I found that I could catch decent trout just downstream of the hatchery after a rain, I quit spending the money to catch trout. Would still make a few trips when my dad wanted to relive old memories.
Along with the trout and cats in the front ponds and the stream, caught a northern and a few nice brown trout in the upper big pond. Also caught some nice cats in the hatchery that was in Elyria (rte 57?) on the smelt that they would stock in their ponds.
In it's heyday, the Medina trout hatchery served a purpose for easy access and some fish not easily available elsewhere. Now, we have so many public opportunities in the area (stocked rainbows, steelhead, cats, shoreline accessible perch/walleye) that a facility like that one probably wouldn't be profitable.