This wont happen with a Tunze skimmer as they have anti overflow. All I do is lift the cup/neck off and replace with a clean one. I have extra cup/necks for them.I have the Bubble Magus Curve 5 on one tank and the Curve 7 Elite on my other tank. I went with them because they were relatively cheap compared to other brands. I don't recommend them. I've had issues with the pumps getting stuck too easily and it's very sensitive to water level changes. This morning I woke up to a full container of skim mate because it randomly decided to go crazy. Seems to happen once every 1-2 weeks. Very frustrating.