The Pennsylvania Fish Commission’s hatchery, at 13300 Hartstown Road, opened its doors to the public Saturday. Visitors saw walleye-spawning demonstrations on how the hatchery propagates millions of fish each year for Pennsylvania’s waterways. There were fly-tying demonstrations. and what’s fishing without cooking tips? So waterways conservation officers demonstrated techniques to fillet various fish and cooked samples of fish common to Pymatuning Reservoir.