Hi There,
Looking for some advice please.

I have a Calorex 510 heat pump purchased second hand heating an 18ft round above ground pool 52" deep.
I use a 3/4HP (0.75) sand filter/pump.

Im seeing approx 0.5c to 1.0c temp difference between inlet and outlet to the pool whilst the heat pump is running. Is this correct for this size of heat pump or should I be seeing more of an increase than this?

Many thanks.