If your pool stays clean with 8hrs circulation a day, your pump is working. You can get a variable speed pump which apparently takes about 6 years to pay for itself (according to my pool guy, who I’ve had for over 15 yrs). Apparently a standard pool (with a solar heater) costs roughly $150/month in energy costs. If yours seems a lot higher, your filter might need to be cleaned or repaired. Pool guy does a great job -let me know if you need his name –