My pool is 27,000 gallons. I live in north Florida along the gulf coast. I would like to extend my swimming season. Without a heater, my season is roughly June through the end of September. I’d like to see if I can add six weeks on either end. May and October are fairly warm here…temps in the low 80s during the day and mid 60s or low 70s at night. Here’s my question: heat pump or gas? I don’t really know what to choose. Any advice?