These are a great way to keep hoses in place and hidden to declutter your tank. Good value for the money and they work as expected, no issues with them loosing suction or getting slimy
Work great to manage airlines. Only wish the suction cups stayed clear and not turn white.
Great to keep airline tube or heater cords in place and out of the way. You can also attach a little anubias to one and stick it on the glass for a little background effect