When I'm finished cooling my wort (BIAB) and start siphoning it into the fermenter, I typically take a gravity sample. On my last batch I took two gravity samples. The first one had more white-ish sediment (and some hops) which measured 1.051. Out of curiosity, I took another reading when the fluid was flowing clear, which read 1.048 (lower). Although the difference isn't major, I'm trying to figure out what causes it. Does the white stuff (excuse my ignorance) from the boil have more sugars than the resulting clear wort? Or do the hops increase the gravity reading since they displace the wort?