I have come across that the pool heater should not be turned on for around the first 3-4 weeks in a "plaster" pool. Does that include pebble finish. I know that they use plaster to hold it in, or it some sort of mix. Pool should be finished in about 4 weeks and we have a person who will come out and teach survival swim in our pool to our smallest, but he requires it to be heated. Trying to get an idea of when we could after it is filled.
We will have both a gas heater and a heat/chill pump.