This is my first winter with my Hayward Sand filter with 150 lbs of sand. And I live in a harsh winter climate where snows can accumulate to over 5 feet. I do not intend to empty it of the sand, but how should I best winterize it. (Not the pool, but the filter.) Should I take the head off and cover it with a tarp, and bring the motor indoors? What do you do with yours, if you have one?