I agree with the above reply.
You would be better off upgrading to a single, bigger skimmer rather than adding a smaller one.
The more water volume you have, the taller the reaction chamber (air bubble chamber) needs to be and the more powerful the pump running the skimmer needs to be.
You could also overdrive your current Remora with a bigger, more powerful pump if your sump can handle the addition of some micro-bubbles without them being fed back into your display. This will also increase the skimmer's efficiency.