Hi Scott, re; fw - I just read that! Now if only I could remember it

, think it was because sw is denser and so proteins will float to the top of it.
Hi Mike, you're the greatest! That one wasn't the only place, just one off the top of the pile - Then a whole other bunch said dry foam was richer in organic matter! And, to make things even more confusing, I read that many proteins are clear (like egg-white) - so what's the dark stuff in the skimmer?