I stopped adding to the skimmer after discovering what it was doing to the pump seal.
I had to change out my pump motor this summer. The motor had a 12 month warranty and it had only been in 9 months. When I installed the motor last year I had installed a new seal. I checked the seal while I had it apart and the rubber was hardened and showing signs of cracking.
At the time the motor went out, I was shocking my pool a high levels just after opening. Since I didn't have but a month last year and 2 weeks this year running the pump, I'm convinced it was the high chlorine level that was getting to the seal.