Hi Tdash911,
I just set up the remora PRO in my system this past Friday. My tank is a 120 and my sump is a 30. After all my calculations, at most minus the volume of water that is taken up by my DSB and 190 pounds of live rock, I might have 110 gallons and I stress "might". The Remora pro kicked right in and started producing foam on my 7 month old reef. I have not used a skimmer up to now. The only thing is that if you plan on getting a remora to hang-on your sump, it is suggested that you get a stronger pump becauae of the difference in head pressure. I went with a Mag 7. The good thing is, the larger the pump, the more efficient the skimmer s goint to be because there will be more water agitation becuase of the added pressure.
I did not go with the in sump Urchin Pro (Same pricing as the Remora), which would have been ideal because I have a DSB in my sump as well. If you do not have a DSB in your sump, the Remora Urchin Pro may be the way to go and will not require you to up the pump beyond the Mag 3, which is the best packaged option. From what I understand from others, the MAG pump is the ay to go.
Best of luck to you!