I've had the house/pool for 8 years, and never had a problem with the 3/4 HP pump before now. I should say I just replaced the motor, not the pump. I'm getting a test kit for high chlorine levels and some bleach today, I'll report back as soon as I can retest.

Should I be running the pump on filter or recirculate? I won't need to backwash if it's just on recirculate, right?