Refugium / Sump

Discussion in 'Medium Tanks' started by JackSplat, 10 Oct 2013.

  1. JackSplat

    JackSplat

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    Hi guys

    I have been toying with the idea to add a refugium to my sump for a while now. The current sump is OK but a little cramped and I sort off cracked it, fixed for now, but I want to replace it anyway. I also want to add another tank, about 230 litre, same as my current DT, and I want to use the same sump for both, hence the extra space around the skimmer and the two return pumps.

    The main reason for the refugium is to breed copepod's etc for a Mandarin (which I want to get in future) and because I find the concept of a refugium interesting.

    Now here is my idea so far...

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    The refugium is separated from the return chamber by three glass panels with a 25mm gap between them. I will fill this gap with a mesh to allow copepods through, but to prevent larger inhabitants from escaping. I will also be adding a small power head for some additional flow in the refugium.

    The refugium volume will be about 30 litre and the overall sump dimensions are 488x680mm by 370 total hight.

    Your inputs would be appreciated!
     
    Last edited: 10 Oct 2013
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  3. shaunn

    shaunn

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    if you are interested i will be selling my 900*600*600 tank with stand fro 2k in 2 weeks time
     
  4. JackSplat

    JackSplat Thread Starter

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    No thank you, I like to design and build my own ;)
     
  5. Hammerhead

    Hammerhead

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    I would rather place refuge in the middle, as then you can maintain a minimum water level in that chamber, the last chamber will be your return in which your ro tops up.
     
  6. Visser

    Visser MASA Contributor

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    Hi @JackSplat... Nice design... But I would make a couple small changes to the layout.

    Here is what I would do...
    [​IMG]

    Keep the skimmer where is was, & move the biocubes to the same compartment to allow maximum dissolved oxygen to flow over the cubes.
    Then place the refugium in the middle to allow more flow over chaeto etc, & place the pumps at the end as shown in drawing.
    I would go with option 2 as it allows for a larger filter pad!

    Cheers
     
    Last edited by a moderator: 26 Nov 2015
  7. JackSplat

    JackSplat Thread Starter

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    Thanks guys, fast drawing skills there @Visser :thumbup:

    My original design was similar to this, but after some reading, and my understanding of it, which is not necessarily correct, the flow through the refugium should be mild to prevent the copepods from being forced into the return chamber. This should be OK if I run only one return pump for one DT but if I have two this may be problematic.

    The other issue is the filter pad, some of the copepods must be able to get into the DT via the return pump (this sounded a bit weird to me too, but how else are they going to get there, or do you have to catch them somehow?
     
    Last edited by a moderator: 26 Nov 2015
  8. Visser

    Visser MASA Contributor

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    The flow over the refugium wouldn't be enough to "flush" the pods out. Even with 2x pumps. (pods can hang on really tight)

    As for the filter pad... You can move it to the skimmer's side & just have an overflow divider on the pump side...
     
  9. Visser

    Visser MASA Contributor

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    Like this
    [​IMG]
     
  10. Visser

    Visser MASA Contributor

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    Or like this to make more space for the refugium
    [​IMG]
     
  11. JackSplat

    JackSplat Thread Starter

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    Thanks @Visser,

    Took your last one and modded it a bit, how about this?

    [​IMG]
     
    Last edited by a moderator: 26 Nov 2015
  12. Visser

    Visser MASA Contributor

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    Could work, but overflow on return size might be too narrow. Narrow overflows are normally noisy & might be too small for the 2 return pumps.
     
  13. JackSplat

    JackSplat Thread Starter

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    True, thanks, back to the drawing board...
     
  14. JackSplat

    JackSplat Thread Starter

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    I think this should suffice. The filter pad would be 200x300mm, the maximum flow velocity through the inlet and outlet will be about 27mm / s at a flow rate of 3000 l/h and I will have a 30 litre refugium :yeahdude:

    [​IMG]
     
  15. Pisces

    Pisces

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    Never thought I would find a sump design "sexy", but you are planning something really cool there.
     
  16. Visser

    Visser MASA Contributor

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    Lol, I should introduce you to my sump... She's available...:tt2: (just kidding) Yeah, he's sump will work quite well...
     
  17. Visser

    Visser MASA Contributor

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    Looks good @JackSplat.
    What water depth are you going to have in the skimmer / refugium section?
    Just make sure it falls within the spec of the skimmer.
    IMO, a water level closer to the "upper limit" as specified by the skimmer manufacturer is always best as you get more gunk out through the skimmer, & the pump wont have to work as hard to keep the skimmer going.

    Also... I would suggest you "test" the amount of water that overflows from your tank to the sump to make sure your return section can handle the overflow from both tanks in case of a power outage...
     
    Last edited by a moderator: 26 Nov 2015
  18. JackSplat

    JackSplat Thread Starter

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    Hahaha, thank you, i think :thumbup:

    Thank you @Visser. The skimmer section will be quite deep, about 300mm, but I will be lifting the skimmer to the correct hight. The refugium will be at 280mm deep.

    I have allowed for 25 litre worth of back flow in a power outage. My current tank spills about 10 litre back, so I have 15 to play with when I do the extra tank.
     
    Last edited by a moderator: 26 Nov 2015
  19. Visser

    Visser MASA Contributor

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    Here's a design for my new sump you might find interesting...

    [​IMG]
     
  20. JackSplat

    JackSplat Thread Starter

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    That is very cool. I like the idea to include the RO-Top Up in the sump design :thumbup: and the placement of the heater. Its a pity I haven't got the space for the top up addition :( , but I think I will follow suit on the heaters and put it on the bottom, under the skimmer, was actually a bit worried about space for them.
     
  21. SteveZi

    SteveZi

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    Hi, I'm interested to know what method of siliconing you use when you build a tank - do you use spacers and inject the silicone, or do you just apply the silicone to the bottom pane and then put the side panels on top of it?
     
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