My 20G AIO Reef


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Mar 11, 2021
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Here's my 20G AIO reef tank. It's already 3 months old and maturing slowly.

I used a holey rock as the centerpiece 'coz I loved how it has tunnels where my Clownfish can swim through.

I added some islands in the corner for additional coral placement. Also tried adding some macroalgae to the DT.

Now I'm trying to switch up coral placements and get a better feel of the scape. I'm also trying to keep aggressive corals away from the others but it's kinda hard to move things around with such a cramped space. I'm open to suggestions if you have any

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First Choice

Have you ever had a reef tank with no sump and how did it go?

  • YES and it was just fine

    Votes: 248 58.9%
  • YES but it was difficult

    Votes: 77 18.3%
  • NO

    Votes: 86 20.4%
  • Other (please explain)

    Votes: 10 2.4%