Swimming pool skimmer flow-diverting weirs for increasing the amount of debris drawn into the skimmer; pool skimmer diverters, namely, hydraulic water-flow diverters sold solely as structural components of swimming pool skimmer systems; swimming pool heaters exclusively for permanently installed in-ground and above-ground swimming pools and not for household, HVAC, or air-conditioning use; installations for heating swimming pools, namely, permanently installed aquatic circulation heating syst...