I know this is somewhere else on this site, but I read thread was a long time ago and I should ask to get sooner answers. OK my temps in Cal where I live in summer are 85-95. 95 being tops. Pool is too cold for me at 82 degrees. So would a pump work since the ambient temp in summer would place in on average of 83-90?,Thanks Dave btw If a heater I would use NG. Pool is IG 13k