If you really want to heat your pool to a temperature comfortable for swimming YEAR ROUND (Jan-Dec), then either a gas heater or a heat pump would be the most efficient option. You would have to perform a side-by-side comparison of the exact models (gas vs heat pump) using current fuel costs to determine which would be cheaper to operate. Solar heating will extend your swimming season, but will not be able to provide enough heat in the winter months due to cold air temps, cloud cover, and low solar intensity due to your high northern latitude. (Obviously, I have assumed that you pool is outdoors). Hope this helps ...
Fiberglass.
Fiberglass. Over time concrete stains and can become rough, where fiberglass retains its smooth texture. Fiberglass will also give you more options.
If it's laid properly, it can be. Then again...you get a guy who uses the best resins, and the best fiberglass, and he can give you a stronger composite using fiberglass than an inexperienced person using carbon fiber.
There is a website called Kayak.com that searches all the airline's websites for cheap round trip flights. You just enter the approximate date you want and your destination and it gives you the best prices.
The cheapest round tablecloths are the ones made and sell directly from China. There are a lot of this stores one Ebay but Walt mart and Kmart are the best solution if the person doesnt want to wait.
A sponge and some fiberglass sealers works the best on a fiberglass boat. There are other fiberglass cleaning material available depending on what your particular need is. For just basic cleaning, I would go with the sponge and fiberglass sealer.
The southern Maine waves
Possible bent rim or tire out of round.(defective) answer tire out of balance is the best place and cheapest place to start
Some will say Obama care, though it won't be the cheapest or best! :)
Somewhere in Maine... of cource
www.columns.net may be your best choice.
www.tank-depot.com offers the best prices online for buying a Fiberglass Tank for pressure washing.