I've had FHMs in my pond for 2 years now with no serious predation. There are days clouds of FHMs look like oil slicks around the aerator plume. When birds swoop down by the plume it appears as though they are jet fighters strafing the water due to FHMs jumping out of the water in fear. One day we took a belly boat out with a long handled minnow net and netted 50 plus with one swoop of the net. It's amazing the attraction of the aerator to FHMs.
