Mmiller2001 Posted March 6, 2022 Share Posted March 6, 2022 How long will it take for a new canister filter to be seeded, with BB, on an established tank? I have a fully cycled tank and the original canister running side by side with the new more powerful canister. I will eventually remove the smaller canister to another tank. Thank you for any insight. Link to comment Share on other sites More sharing options...
lefty o Posted March 6, 2022 Share Posted March 6, 2022 starting it on an established tank, 3 days will have it pretty well colonized with bacteria. if you want to be good and safe, give it 5 days. 2 Link to comment Share on other sites More sharing options...
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