I have a half round SS strainer that I put three layers of paint filter bags in. I use Irish Moss @ 15 minutes and get very clear beer above the hops/trub after cooling the BK. At the beginning there is a little silt that goes through, and as I get closer to the bottom I start to pick up some of the trub and gently pour it over the filter bags. As the filters catch more of the trub, the efficiency of the paint bags becomes greater, and takes progressively more time for each batch to filter through into the fermenter bucket. When I hit 6 gallons or so, I pull the strainer off of the fermenter and put it over a bowl, and slowly add the rest of the trub/wort into the strainer. At this point, I am not worried about strict sanitation as whatever drips through will be put into a jar to become some of the next batches starter.