We run our small outdoor pool year round in Cleveland. Last year, when heavy snow was in the forecast, I would cover the pump with a tarp. Is that necessary? The water stays heated to around 75-80 all winter long, but I'm concerned about snow getting in the back of the motor housing. I was thinking about buying this: Amazon.com : Pentair Intelliflo Pump Motor Cover - Variable Speed Pool Pump Motor/Drive Cover - Outdoor : Swimming Pool Pump Accessories : Garden & Outdoor