OfficialThomas Posted December 19, 2022 Share Posted December 19, 2022 Hi! I have never quarantined my fish (and never had problems) but I want to start quarantining new fish from now on. I was wondering if you need the quarantine tank to be cycled. I saw the video Irene made on the aquarium coop channel about using a sponge filter but I use a hang on back filter in my display tank and I don't want to add a sponge filter. Does a quarantine tank need to be cycled? Could I use a filter intake sponge instead? Thanks! Link to comment Share on other sites More sharing options...
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