I bought some "natural, no deet" repellent from Amazon. It seems to work pretty well. It has a cedar smell to it that's "ok" as opposed to deep woods off. I've seen a big increase in dragon flies over the last few weeks, hopefully they'll get the mosquitos under control. (Ha!)

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.