MarineLandPRBW150B 150b Bio Wheel Assembly Penguin Filter Parts for Aquarium

Why are they so expensive? You can buy a new Penguin 150 w/bio wheel for $4 more and have a backup just in case.

my tank is 25 gallon have twin filter need bio wheel not sure what size i need what size do need

Does anyone else get filters with a hole? The ones I've gotten have 1 hole in the crease like the seam like it wasnt connected.

Bio-wheel was only used for my quarantine tank. Do you recommend replacing the bio wheel if it’s exposed to Copper Power?