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switchover

  1. Scorp1us

    Filter switchover - how long to run both?

    I am moving from a HOB to a canister, and I currently have both running. I figure it's a good way to populate the canister with nitrating bacteria. But how long should I run both for before removing the old one? I'm trying to prevent a mini-cycle. 30g / 16 fish (Demasoni +1 pleco)
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