How do I stop my fish from making more baby fish? I had 6 fish to start but after 2 years I had 152!! I since moved my pond about 4 months ago and kept 10 of the fish as went to smaller pond. I have today notice another 100 or so babies!!! I promise I am not lying there really is that many. I do nothing to my pond! I Have a resident frog, newt and pond scatters but also very randy fish. My pond will not sustain this amount of fish. Any way I can stop them breeding??