Well, not all the GSF have had teeth marks just a couple early on. Since I’ve turned off the aerators a couple days ago I haven’t had any dead fish. I’m not sure why but I’m going to continue to monitor the situation and see where I am in a couple weeks. Maybe I was super heating the pond with the 90+ degree days and that much aeration power in the small pond just started causing turbulence and heat issues.
Thanks for all the input folks.