fish n chips - There's a hatchery right near here, but I don't know if they sell YP, I'll have to look into that. Good point.
If I stock too many fish, what's the downside? Stunted fish?
Make sure to find out the sizes of YP that are availble. You might need to restock larger ones, thats were it gets difficult.
Yes, stunted fish, and possible eradication of one or more of the species if not stocked to proper ratios. A feeding plan can let you add more fish.
