Al The ceramic rings will only trap the largest debris. .
I have a canister and 1 hob on each tank the hob allows me to easily change my media (ammonia remover/purigan/carbon) with the canister I half to turn off and open the unit that always involves some small water clean up.I have four penguins running, and use nothing more than a plain blue sponge and ceramic rings. Rinse out the Rings every few months, rinse out the sponge once per month and replace every six months or so. If I had the money to do it all over again, all of my tanks would run canisters. Simply because of the noise and versatility.
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