BRS BIO Reactor

[fishtk75]

New Type 10" Refillable Bio Pellet Cartridge for use with the BRS Bio Pellet Reactor.
I have two of them and anyone have problem with them?

I looked at the Cartridge and looks as they are not molding them right from the supplier. The slots are not open good to let the water in and out.

 

[fishtk75]

What members use them if not what do you use and how is it working for you?
Do you see any change in the tank from using them?