I live in the Dallas area and I am looking for opinions on heating options for my pool. I am looking to put in a small pool and spa approx 10,000 gallons total. I am wondering if a heat pump or gas heater would be more effective. Right now every pool builder I meet with states I will not be happy with a heat pump and are recommending gas heaters. I am concerned about the cost as natural gas will not stay cheap forever. However, will the heat pump do its job when it is 30 degrees outside? Any advice would be appreciated. Thanks