I'm piecing together bits and pieces for a pool this summer from craigslist. I have a 15'x42" Summer escapes metal frame pool and today I got a Hayward S166T sand filter and pump. Here's my question, when I picked up the filter I was alone and it was insanely heavy. I tipped it over and poured water out of one of the top valves and also some sand poured out. Now I'm wondering if that was a bad thing, did I damage it? Am I'm going to need to replace that sand? It wasn't alot, probably only like 1/2 cup. I'm a total newb at this so I'm not even sure how to hook the thing up.