Suction cups work well with both freshwater and saltwater aquariums. They get fixed on all types of glass surfaces. There are clips with each suction cup for easy installing and removal of airline tube. The clean and transparent appearance of the suction cups makes them look good on the aquariums. The suction of the cups is very good and works well in different types of glass surfaces.
Before use, please soak this airline tube holder in the water for a few hours.