I need help heating my inground gunnite pool
we live in new england and just opened our pool over memorial day weekend. the problem is our pool never gets above 65! We need some help on getting our pool to be warm enough so we dont get sick every time we go in it! we have tried lining the inside of the pool with a thin black plastic but that doesnt seem to be helping. could you please help us with some CHEAP ideas becasue money is tight and our pool is freezing.!