During the Summer months I am planning on not using the heater in my swim spa. I live in the south and the weather here is plenty warm and will keep the water plenty hot. My question is do I need to keep the cover on the spa 24-7 like I would in the winter(and cooler) months. I would rather use my swim spa as a plunge pool during the Summer months of the year. I know that leaving the cover off would make the water subject to debris and critters. However not being concerned (?) about keeping heat in or evaporation do I have to always keep it covered when not in use in order to not harm the spa. I'm hoping this idea of mine is not harmful to the water chemistry or the spa itself! I'd really appreciate any advise anyone may have have. Thanks Much!