Marie,
Interesting timing, I woke up this morning and spotted a heron on my neighbors roof, looking at me as if asking me what was on the menu today
My koi were extremely skittish today when I got home from work, I could barely get them out to eat, and I still can not account for one of them, I have a tiny corner of my pond that the net does not cover perhaps the heron managed to get my smallest koi.
I agree I need to get rid of the rocks, at least the ones that have fallen to the bottom, problem is how did I grab them (about 5 feet down or so)? I suppose I am going to have to either get some kind of a grapping hook or go diving