Originally Posted by Dogstar
The Remora should have a thick black rubberband/O ring around the outside of the cup that you roll it lower on the cup and that holds the cup higher. I dont know of any other way to adjust a remora.
Yes that is correct way to adjust a remora. But this same exact thing happened to me awhile back. I had to take the whole thing down to my tub and give it a good cleaning. You have to use the long brush thing that comes with it to clean the inside of the intake. When removing the little plastic screw, you have to be real careful not to turn it too hard, or you'll never be able to get it out, or it may fall in if you tighten it too tight. Take that screw out and clean the inside with the long skinny brush that comes with it, take off the powerhead and clean the inside of that intake tube also. I'm not sure how to take apart rios to clean, but my maxi-jet was easy to clean. Then I just put everything back on and adjust the cup, no more overflows. I find if the skimmer is plugged up with junk, it will overflow on you, but other then that, it's a great skimmer!!! Your problem lies here, it was used and probably was sitting there dried up, need to soak it to get all the junk soft again before scrubbing. Soaking it in vinegar wouldn't hurt either, the intake part that is. Good Luck! :happyfish