What is the procedure for closing the pool using the BBB method? This is my first year using the BBB method, what a great summer, so I'm new to closing this way. Also since using the BBB method I don't want to clean out my filter's sand. I'd rather reuse it next summer. So..... do I just drain the water out of the filter and store as is then? If not what's your tip? Man, I love this BBB. The cleanest, the sweetest and the easiest cleaning I have ever experienced.