I've got some GSH which were stocked when the YP were stocked. Unfortunately I lost a lot of them right away, as they were attracted to the nylon netting in the grass mats I had put down in areas that I thought would wash. One would get caught and attract another one. There were 100s caught, like a gill net. Most died. I did catch a few last summer on small jigs, fishing for YP. I was surprised at how large they had become. I'm assuming they are reproducing. Probably wrecking havoc on my YP fry, from what I've read here. GSH grass mat gill net..
12 yr old pond, 1 ac, 15' deep. RES, YP, GS, FHM (no longer), HBG (decreasing), SMB, and HSB (only two have been seen in 5 yrs) I think that's about all I should put in my little pond. Otter attack in 2023.