Biorb Water Level Guide & Feed Hole Plug - For All Biorbs
Reef One Water Level Guide & Feeding Hole Plug.
A really handy device from Reef One for any of the Biorb range of aquariums.
Seals the feeding hole to prevent splashing and water deposits.
Also doubles up as a convenient feeding spoon meaning you can feed directly through the feeding hold of the aquarium into the water without getting food stuck to the rim.
Also has a guide for the correct water level for the Biorb aquarium so you can easily tell where to fill the tank up to