Penn Plax Cascade Nylon Filter with Biological Ceramic Rings

This does the same thing as the charcoal with a lot less mess. It is a pain to have to remove the charcoal packet every time I put in an algae treatment. I just set up a new aquarium and for some reason the algae has been very difficult control. Correction, it has been out of control but I'm winning the battle. I recommend these and believe you will like them too.

Have not used them yet but arrived as expected. Have read about ceramic rings and their usefulness for maintaining helpful bacteria in aquarium filtration. Will update after having used them.

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