I got the Aquamaxx during a BRS sale a few weeks ago and had nothing but problems from bubbles, overflow from the cup and intake. It was to the point of being scared to leave the room while it was on.
So I unplugged and did some research, combined a lot of ideas from various sources.
1. I had an air leak from the connector to the motor. I don't know if it's a manufacture defect but the connector never felt snug against the motor and would easily come off (when sliding it into the skimmer), put a little coral glue around it and now I see no air leaks or small bubbles on that side of the skimmer. I also secured the hose with a tiny o-ring around the connector and put more coral glue around the o-ring (in my head, I'm thinking I'm blocking possible chemicals getting in the water from the o-ring, someone correct me if I'm wrong).
2. I also bought a stronger o-ring to hold the cup. The o-ring that comes with skimmer would not hold the cup or stop it from sinking once it got a little greasy no matter how many times I wiped it off. Got the o-ring from home depot (The DANCO Spout #5 O-rings).
3. Now I'm doing the vinegar/water method with a bucket in the sink. I had it run for an hour last night, there were no leaks anywhere and it ran great. I'm going to run it again today, clean everything and put it back on the tank to see how it goes.
4. I also filled it the skimmer just past the nozzles and let the skimmer do the rest. At first I was filling it up to the two screws, and water would leak from the intake every time.
I'll reply to this thread if this works or not.
Beyond frustrated with the poorly written instructions, even the video didn't help. I think these companies forget that some are beginners and will need a little more than black and white photos and videos with jump cuts with no explanation of what went where and why.