Once new plantings have established, you can start to stock new fishponds with fish. Start stocking and feeding when the water is warm.
Don’t leave fish sitting in plastic bags full of water - get them in to the pond as soon as possible so that they have a sufficient supply of oxygen.
Avoid introducing goldfish into the wildlife pond, as they will upset the pond's natural balance.
Troubleshooting
Continue to remove blanket and duckweed.