I just 2 days ago finished construction of an 18 by 32 inground pool. It is just over 8 feet deep and under construction that put it about one foot into the water table. The ground is all very solid clay around the pool. The builder placed a deep sump pit under the deep end with a sump pump adjacent to the pool that pumps the water table out. In my uneducated opinion I think this sump pit continuously running is a waste of energy and not accomplishing much. The builder thinks I may get a floating liner if I turn it off. Maybe using it when it is very wet outside it may accomplish something, but is it really being useful?
I am not sure about this and would appreciate some insight.