As I said, Zett's has some wild far fetched ideas on fish and stocking recommendations.

North east PA is most likely too far north to stock RES and RES are illegal to stock in PA anyways. So... They are a no go.

If you talk to Zett's and they make other recommendations, please come back here and let us know what they are so you can make an informed decision.

Your initial stocking can be the smallest size of each species available. Or, if you want to speed up process and have fish ready for the table and fishing sooner, you can stock larger ones. As your pond matures and you begin to have larger CC and HSB in your pond, the need to stock larger fish will arise. Otherwise, many of your newly stocked fish will become fish food themselves, very expensive fish food!