Tonight I was netting the pond; still have late spring leaves and debris blowing around, so I have to keep at it. Most passes along the bottom brought up EARTHWORMS! Probably dozens of them after several passes, many of them still wiggling. I would swear there was a hole in the liner that they were coming in, but I'm not losing any water. Where on earth (no pun intended) are they coming from!!! My daughter is convinced we dug a hole to hell but I imagine there is a better explanation. Any thoughts?