my pool is 82 degrees and my heat pump for the pool reads 68 degrees why is there a big gap. I have an inground 72000 litre pool 30X36 I just had the circulating pump replaced on is there something I can do to remedy this?

my pool is 82 degrees and my heat pump for the pool reads 68 degrees why is there a big gap. I have an inground 72000 litre pool 30X36 I just had the circulating pump replaced on is there something I can do to remedy this?