The EHEIM skim350 is a surface skimmer that removes the film formed by microorganisms, dust, oils and food fats at the top of aquarium water. Clearing that layer helps maintain an open water surface for gas exchange.
Surface collection and sponge filtration
Water drawn from the surface carries the film and suspended dirt into the unit. The filter sponge retains the collected material. Remove the sponge for cleaning. The skim350 comes ready for use.
This process addresses the surface film directly. It is useful when that layer is visible even though the aquarium already has a separate filtration system.
Continuous or occasional use
Run the EHEIM skim350 continuously or for shorter periods, according to your needs. If you move the unit between aquariums, take care not to transfer algae spores or disease from one system to another.
Cleaning
Remove the filter sponge and clean it thoroughly after use so the material collected at the surface does not remain in the sponge. Keeping this part accessible makes regular inspection and cleaning easier.
- Collects surface film and the microorganisms within it.
- Helps maintain gas exchange at the water surface.
- Captures drawn-in dirt in a removable sponge.
- Suitable for continuous or short-term operation.



