Yikes, thanks for pointing out the heater size - one too many zeros in my number - I meant 300 MBH.

Yes, I do plan on only using to warm the pool occasionally and maintain warmer temperatures for possibly one month in the spring and 1 month in the fall. Other than that there really isn't much need for continuous heat in my climate. This year is an exception howevere because I just filled the pool with fresh water and if course we're having some really mild weather right now so I'm not picking up a lot of heat.