Display tank Overflow

Discussion in 'New Members' started by ashbeggs, 2 Jun 2009.

  1. ashbeggs

    ashbeggs

    Joined:
    3 Feb 2009
    Posts:
    38
    Likes Received:
    0
    Location:
    Durban
    Hey guys

    I have a 4ft x 2ft x 2ft (120cm x 60cm x 60cm) tropical display tank. I'm wanting to convert it into a marine tank, but need to know the best way of feeding my sump tank from the display tank.
    Should I have an overflow fitted on the outside of the tank or on the inside with a hole cut into the bottom of the tank, or should I pump the water out?
    Please help with options here.
    Thanks:thumbup:
     
  2. AdS Guest




    to hide all adverts.
  3. Jaco Schoeman

    Jaco Schoeman MASA Contributor

    Joined:
    22 Dec 2008
    Posts:
    2,241
    Likes Received:
    48
    Location:
    JHB
    WELCOME DUDE!!!!! EMJOY THE TRIP!!!

    Okey, not a good idea to pump water out of the tank, as you then have to pump pack up again, and believe (I've been there) to get a balance right is an absolute nightmare!!! The moment you have it waxed, something happens and one either sucks too fast and you have a flood on the other side...

    I'd say, drill a hole in the bottom of the tank (back) and build a glass "box" around to where you want the water level to be. You then have good surface skimming, and you can plumb pipes from there into your sump. Should the sump pump fail, the water level drops until below the "box" level, and your sump can not flood this way...

    Good luck:peroni: mate!!!
     
  4. Reef Maniac

    Reef Maniac MASA Contributor

    Joined:
    15 May 2007
    Posts:
    2,899
    Likes Received:
    112
    Location:
    Bloemfontein
    WELCOME to MASA and to this great hobby :)
    NEVER even try to balance flow with two pumps.

    If you have an existing tank, I would suggest that you either drill a few holes close to the top on one of the sides, or (better still) just cut about 30mm off the top of one of the side panes, and then build a smallish box around this, creating a "weir" type overflow. With either of these options, if the glass pane should break while you are doing the conversion (and that's a real risk...) you will only have to replace the one side pane, and not need to dismantle everything as would be the case if the bottom pane cracked.

    Something like this:

    [​IMG]

    Hennie
     
  5. Jaco Schoeman

    Jaco Schoeman MASA Contributor

    Joined:
    22 Dec 2008
    Posts:
    2,241
    Likes Received:
    48
    Location:
    JHB
    Ditto x2 on the above!!! Rather go with Hennie's design ;)
     
  6. Stressed Eric

    Stressed Eric

    Joined:
    20 May 2009
    Posts:
    294
    Likes Received:
    2
    Location:
    Pietermaritzburg Kzn
    That's great advice Hennie, I wish I'd read more and gone with the external weir overflow instead of drilling the bottom glass and wasting tank real estate and dealing with durso's !

    Oh, and welcome Ash :)
     
  7. ashbeggs

    ashbeggs Thread Starter

    Joined:
    3 Feb 2009
    Posts:
    38
    Likes Received:
    0
    Location:
    Durban
    Thanks guys
    the internal sump would look nicer, but i agree, risky!
    I already have an external overflow from a smaller 3foot marine tank I have which i was gonna use as my sump tank. I think I'll just cut the side as mentioned above, which leads me to my next question....I have 10mm glass! should i send it to a glass place to get cut, or is it east enough with the right tools?
     
  8. Jaco Schoeman

    Jaco Schoeman MASA Contributor

    Joined:
    22 Dec 2008
    Posts:
    2,241
    Likes Received:
    48
    Location:
    JHB
    Even if you send it off, there are always risk of cracking... But... I personally am a bit scared to drill myself, so I leave it to guys that has less chance of breaking it...

    But it's up to you. Check on the home page, there is a thread on the left side called aquarium design. There they speak of how to drill correctly. Check it out first... ;)
     
  9. Reef Maniac

    Reef Maniac MASA Contributor

    Joined:
    15 May 2007
    Posts:
    2,899
    Likes Received:
    112
    Location:
    Bloemfontein
    Thinner glass is easier to cut, but more risky to drill. 10mm Glass should not be too great a risk to drill, if you do it correctly (and while the tank is empty...).

    Obviously, if possible, rather let a pro do the work.

    Hennie
     
  10. riyadhessa

    riyadhessa

    Joined:
    21 Nov 2007
    Posts:
    3,370
    Likes Received:
    9
    Location:
    Cape Town
    ashbeggs welcome
     
  11. MikeMck

    MikeMck

    Joined:
    22 May 2009
    Posts:
    28
    Likes Received:
    0
    Location:
    Gauteng
    I attempted to drill my tank 10mm glass - BIG MISTAKE - it broke

    Taken to Pet Stop (Shawn) to fix. They told and showed me the amount of DIY people (like me) that make mistakes when they do DIY. I will never do any of my tanks DIY again, it is to risky.

    Getting back to the holes, they take up to 40 minutes to drill a hole - but they break only 1 out of 150 glass panels. + they told me Hennie is correct, holes on the top is better in the long run than holes in the bottom, stress fractures and leaks are the main problems.

    So yes get holes but not DIY and not in the bottom!
     
  12. Alan

    Alan Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    5,974
    Likes Received:
    119
    Location:
    KZN
    Welcome, great idea from Hennie, they work very well.
     
  13. jacquesb

    jacquesb Retired Moderator

    Joined:
    29 May 2007
    Posts:
    17,868
    Likes Received:
    69
    Location:
    Cape Town
    MikeMck - Personally - even though I have NEVER done this myself - think that if you can get someone to "show you the ropes" for the 1st one, the DIY route will not/should not be such a problem!

    Good luck!
     
  14. MikeMck

    MikeMck

    Joined:
    22 May 2009
    Posts:
    28
    Likes Received:
    0
    Location:
    Gauteng
    Only me?

    I thought so myself (saw it been done 3 times - with explanations) and still broke a R700 panel of glass:(
     
  15. ashbeggs

    ashbeggs Thread Starter

    Joined:
    3 Feb 2009
    Posts:
    38
    Likes Received:
    0
    Location:
    Durban
    Yeah...I'll visit my local pet shop and see if they can do it. Thanks guys!!!
     
  16. Stressed Eric

    Stressed Eric

    Joined:
    20 May 2009
    Posts:
    294
    Likes Received:
    2
    Location:
    Pietermaritzburg Kzn
    Er, I drilled 5 x 1 inch holes in the bottom of my tank without cracking. I was quite impressed with myself until i over-tightened the pvc fittings for the durso and heard the dreaded high pitched cracking noise. Sigh. Note to self and others. Hand tight with marine silicone next time. Sigh.
     
  17. Reef Maniac

    Reef Maniac MASA Contributor

    Joined:
    15 May 2007
    Posts:
    2,899
    Likes Received:
    112
    Location:
    Bloemfontein
    Ouch :( :( :(

    What was the thickness of the glass, and how did the holes look after drilling (any chips...)

    Hennie
     
  18. Boendoe

    Boendoe

    Joined:
    13 Jan 2009
    Posts:
    598
    Likes Received:
    0
    Location:
    Wilropark Roodepoort
    Take it to GSA (Glass SA) they form part of PG Glass, they charge R 35.00 for a 25mm hole. That's If you can get your Tank there.
     
  19. leslie hempel

    leslie hempel Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,537
    Likes Received:
    282
    Location:
    Gonubie East London
    normally the glazers wont drill an already assembled tank. you may need to purchase a bit and do it yourself...
     
  20. corylyle1

    corylyle1

    Joined:
    13 Apr 2009
    Posts:
    49
    Likes Received:
    0
    Location:
    Cape Town
    WELCOME 2 MASA ASHBEGGS!! I agree with jaco, dont try and pump water out!!
     
Recent Posts

Loading...
Similar Threads - Display tank Overflow Forum Date
Crab - Display Tank or Sump? ID Needed 7 Feb 2015
Check out these awesome sponges growing in our zeovit display tank!! Zeo sponge... JungleAquatics.NET BLOG 18 Jan 2015
[wtd] 1200 x 450 display tank urgent- Cape town Wanted 28 Oct 2014
Urgent help needed Display tank leak Urgent Help Needed 28 Oct 2014
Sps madness in our zeovit display tank JungleAquatics.NET BLOG 21 Oct 2014
Now our display tank can breathe a bit! :) JungleAquatics.NET BLOG 19 Aug 2014
Starting our shop display tank (sps zeovit system) JungleAquatics.NET BLOG 3 Aug 2014