Thanks for the reply...still not sure what it WAS but it's gone now. I ran my barracuda all day yesterday then shocked and ran the pump (not with the barracuda) all night long and this morning it was clean again. I am GUESSING it was just fine dirt/silt or something, b/c I don't think an algae problem would have cleared up THAT fast (I have dealt with algae before). It was super cloudy yesterday and honestly is sparkling today, so go figure

But I'll take it!

Thanks again!

Oh - I have a regular filter pump, not sand.