I have a RS 180 and I use a acrylic riser to b ring it up to the 7" recomended water height. If I remember correctly the recomended water height on a RS 280 is 9" so if you want a 10" high sump baffle you only need to raise the skimmer 1". It is also a recomended height for idle opperation, you do not need to raise it, but I would stronly recomend it.