Its been setup for about 3 weeks now.. there was indeed a lot of bubbles around the helix but those have worked themselves out by now. Could be that there were more bubbles underneath the top cap (since I can't see the part of the res) but the water drop that occured was a lot more then just mere bubbles at the top.
I've had issues with some leaks before but that was all due to overstretching the tubing. I've since added a longer cut of tubing and added a 90 in one place to resolve the two places I've had a leak before and haven't noticed one for 2 weeks (took about a day before to notice the leak) .. it could be that this one is even slower and is evaporating before I can find the spot but I have no idea how to catch it then