I don't think I'll have aeration this summer Dave. There's no electric at the pond yet and I'm poor anyway. There's two things I'm planning on doing to deal with the hot weather. One is to keep the biomass of the pond significantly lower than your average farm pond. The other thing is to stock native species that are more tolerant of low DO than others. Someday when I can I'll get an aerator, but I still think I'll work to keep the fish density down.