I used a canister filter in addition to a wet-dry system and a protein skimmer on my octopus tank. Since water is flowing through the canister, you don't need to rinse it out so often. I rinsed out some sponges and changed a Purigen filter in the canister maybe every 3 months. For corals and bioballs, there's nothing to rinse out. I grew a large colony of amphipods, and I tried to save them when the water was changed.
Great name for your octopus, Thor!
Nancy
Great name for your octopus, Thor!
Nancy