NE
Here's one of my screwball ideas which i might try if we get a real hot summer, I know your gonna laugh. Take 10 or 20 sheets of 1 inch styrofoam insulation with the aluminized facing, link them together with rope at both ends,and put them out in the morning on sunny days,and bring them in at night. They can be stacked next to the pond, and put out ,and brought in without too much trouble. It's sort of a last ditch idea to keep temps down.
NO I don't drink!!!