Paid about 30 bucks each for them at the lfs. One is 2 or 3 years old. The other maybe a year. They move a good amount of water and dont require priming after a large water change.

One is my bio filter, the other is my mechanical filter.

One I lost the blue grid for it so I replaced it with bioballs.
One side is a factory cartridge. The otherside is biomax.
I have a sponge prefilter on this one.

Too bad disposable cartridges are so expensive. . Oh wait, bonded poly pads fit inside the bio holsters.
Sent from my SCH-R950 using MonsterAquariaNetwork App

One is my bio filter, the other is my mechanical filter.

One I lost the blue grid for it so I replaced it with bioballs.
One side is a factory cartridge. The otherside is biomax.
I have a sponge prefilter on this one.

Too bad disposable cartridges are so expensive. . Oh wait, bonded poly pads fit inside the bio holsters.
Sent from my SCH-R950 using MonsterAquariaNetwork App