Hi all. New member here, and new pool owner (installed last Fall). We have a 10,000 gallon fiberglass freeform shape pool and are debating between natural gas and heat pump options to heat. The pool will sit in full, all day sun so we don't antipate needing to heat June-August, however, we are looking to extend our season in May (perhaps April?) and September/October. We like about 30 miles north of Boston, MA. I've read many differing opinions on nat gas vs heat pump. A heat pump appears to be 1,500 or more initial cost, and lower operating costs, but we are concerned that it will not be effective enough when we really need it to be (when the ambient temperatures outside are cooler than Summer days). Gas has instant gratification, however, our biggest concern is operating costs. One HP co. ran numbers for us and they estimate between 1,900-2,500 per season (Apr-Oct) using natural gas. Knowing that we wont run the heater Jun-Aug, that would be greatly reduced to ~800-1,000. However, I've read posts on this and other boards where people are claiming that natural gas cost them $150. per day to heat their pools! Thats just not in the cards for us. The units we're lookin at are a 200k BTU Hayward or an Aquacal SQ 110. Oh, and we will be using solar sun rings as our 'blanket'. Many thanks in advance for your help!