Hmmm I recalibrated my refractor checked my tank salinity, it's 1.025. Skimate is 1.015 same as Greg's. I wait until my skimmer cup is full before I empty it. The sg never changes. I also measued how much my collection cup holds and it's 14 cups of liquid and not including the sludge. Thats quite a bit. So you'd really have to take a whole lot of wet skimate out to effect salinity that much. P:lus throw in the 10G of fresh water thats added.
Have any of you brainiacs looked in to this theory at all bout skimate dropping sg?