Eheim Suction Cup for Aquaball + Biopower Aquarium x4

They're great but don't last very long – so you have to keep swapping them.

Does exactly what it is supposed to do.

These are a necessary evil. I use Jager heaters exclusively which I love the but I hate these suction cups. They just don’t last very long before they come brittle and lose suction. I typically get around 6 months before they fail so their durability is quite lacking. It’s been this way for more tha… Read more

I find I have to replace my eheim suction cups once every six months because these get hard around that duration of time. This will work with all Eheim suction stems. just put the old hard suction cups in hot water and peel them off and replace with these new ones. Job done!