It does this by positioning its self-adjusting funnel to just beneath the surface where it can rid the surface of debris and oils. Once detached, it can be removed from the aquarium. This makes it very convenient to target different issues in the tank.
Fish Tanks Surface Skimmer Oil Slick Remover Part Aquarium Filter Three-in-one - AliExpress
Small Pond Surface Skimmer
Black Hole Skimmers - Aquarium Skimmer
Oase CrystalSkim 350 Skimmer
Black Hole Skimmers can also be set up with a pump in normal configuration, as with this SICCE Syncra 0.5 pump. The Syncra 0.5 is a great pump to use
Aquarium Surface Skimmer (Bare)
Black Hole Skimmers - Aquarium
Black Hole Skimmers - Aquarium
Black Hole Skimmers Aquarium Surface Skimmers (Mounts on Stand) : Pet Supplies
Aquarium Surface Skimmer (Nano)… : Pet Supplies
Pond Skimmer Black Hole Skimmers
Black Hole Skimmers: Aquarium Surface Skimmer with Mount (Media Included, Pump not Included) : Pet Supplies
Fish Tank Water Surface Oil Protein Skimmer Lightweight Adjustable Water Flow For Aquarium Fish Tank
Black Hole Skimmers