Short of infusing cooler well water into the pond, there's not much else I can do to reduce the heat if I'm going to aerate the pond. Being a small pond, some things happen much faster than on large BOWs, temps being the most obvious
I've got a small floating fountain which runs 24/7 so that keeps the surface water moving a bit on my small pond. I guess it also, at least in theory, helps reduce the water temperature through evaporative cooling. However I'm not sure if it might actually add to the heat load on extremely hot days.
