I hear ya again
. Naw, the sprinkler thing really works. Last year i bet it cooled the pool at leat 10 degrees if not more. As brutal as last summer was and the water felt cool after running it for awhile. Hooks into your inlet at the skimmer, shoots up a fountain and as it rains back into the water some evap takes place and cools it. After cycling for awhile it cools the pool. At least that's my take on the gizmo, hmm..