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I just bought a aquaclear 50. Currently have a 20. If I take all the media from the 20 and put it in the 50 with the new media(all going into the same tank as before) do I have to worry about a mini cycle. So just replacing the filter I have now.
Good. I took the extra insert for my AC20 and doubled it up with my current media from the AC20. Should work good then I can replace with proper size pieces as I go or mix and match different types of cartridge. That's why I like the AC series. And no new fish.