i would ditch the pad on the coral life skimmer and just use a piece of 3/4" pvc with holes cut in it like this:
except a little more uniform and stagger them on the other side. also it looks like you are skimming a little wet from the pictures. i would turn the red knob a little more closedso the top of the micro bubles are just under the begining of the cone shape. i keep my salinity a little higher around 1.025 but that is just me and your rocks seem to be doing good per your test results