Thanks all.

My pond has a fair amount of fry from the FH I stocked recently and Mr H's pond is teeming with them. I think I'll have to trap a good number from his pond just to keep them in balance. That said I don't think FH will be in short supply.

Whenever I transfer FH from his pond to mine I always take a few gallons of water from the weedy area of Mr H's pond. Besides that his pond is above mine and has overflowed quite a lot in the last month. I think this has resulted in my new pond being more seasoned than most ponds of the same age.

I think I'll add some hay like ewest said, and trap some crawdads. I don't see many snails in the local ponds or creeks. Could it be that the water is too soft or acidic?

I have about a billion small black tadpoles in the pond, I think from tree frogs. I put a few tiny ones in the aquarium with the RES and they spit them out.