The fluval canister filters are extraordinary for me! If you are open to it, let me tell you how quiet it is and has several options available including co2 add ons to the hose to diffuse the co2 in the canister completly if you ever are interested in that.
But one of my favorite things about the fluval canisters is how quiet it is! Don't hear a sound.
I should know if it is on sale or not, since I work at petsmart. Haha but I don't work for a few hours, can't help you out there
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