I'd remove the internal. They are easy to remove. Get a sharp knife and (carefully so as not to damage the seals
) cut through the "blobs holding it on. Once the first few are off, the box usually just pulls free. Then scrape (again carefully to avoid scratching the glass) the remains of the "blobs" off (or in my case, pull them off, they weren't as securely attached as they looked...)
I was thinking though, and could i put the pump on the bottom of the tank ( so the lr will hide it) and connect a longer tube from the pump to the skimmer?
You could do this, but it will reduce the air flow into the skimmer, or potentially stop it all together. The consensus is that you can get better performance from more air injection, so ideally you want to keep air flow into the skimmer as high as possible
All the best
Rabbut