Five Star Aquatics Chamber One Filter Media Insert for Hello Reef 15 Gallon Aquariums Coralife BioCube 32 you should never cut open

you should never cut open the bag and separate the product at all

allows you to create a refugium

An inTank first - A universal design that fits multiple different aquariums - see fitment list below

Allows you to raise the water level on most All-In-One aquariums while still skimming the surface

This “flash skimming” principle

Five Star Aquatics Chamber One Filter Media Insert for Hello Reef 15 Gallon Aquariums Coralife BioCube 32 you should never cut openFive Star Aquatics aquarium specific filter media inserts help improve the filtration and clarity of your aquarium while making maintenance extremely easy. What once was a dreaded chore of changing filter media and getting access to the aquarium is now made easy utilizing a 3 Sided Tower Design system. This Media Basket is three sided for easy access to change or rearrange your filter media, once installed it becomes a four sided dedicated flow route