I also just purchased an AquaC Remora Pro as my first skimmer. It has been running for 3 days now. After the first 24 hrs with the cup as low as it will go, there was alot of wet green slime in it. Practically nothing at all since then. Mine was also sending millions upon millions of microbubbles into the tank. I solved this by placing a piece of foam in front of the return shoot, down low so it doesn't back the water up or anything. This didn't stop the bubbles completely, but it did help tremendously. I would really like to see some more stuff in the cup though. The paper that came with it said the break in period of 2 weeks, so I guess it is going to be awhile.