New to ESHOPPS Bio Cup R, (Rectangular) media cup is designed to be used in place of a standard 4”x7” filter sock. ESHOPPS Bio Cup R all acrylic construction & high flow water channels allow for any type of filtration media such as, floss, ceramic media, carbon, or GFO. Bio Cup R fits perfectly into any ESHOPPS 4”x7” filter sump(s) sock cradle and easily accommodates stacking different media types in a tower style filtration method. Bio Cup R is reusable and easy to insert & remove for servicing.
I would definitely recommend adding these little guys to your tank. They are very playful and entertaining. My three were very healthy and quickly adjusted to my tank.
