acceptable bow on a rimless tank

Discussion in 'Anything DIY Related' started by leslie hempel, 14 Jun 2011.

  1. leslie hempel

    leslie hempel Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,544
    Likes Received:
    285
    Location:
    Gonubie East London
    ok i have a dilema

    my tank has a small bow approx 1-2mm not 3-4mm as i thought before..

    as a tank builder i have never done rimless before and am not sure if this is aceptable..

    advice please..
     
  2. AdS Guest




    to hide all adverts.
  3. butcherman

    butcherman Moderator MASA Contributor

    Joined:
    7 Sep 2009
    Posts:
    11,626
    Likes Received:
    280
    Location:
    Kempton Park
    My std 3ft tanks always had bows on them 2-3mm but i never did feel safe looking at them bow like that.
     
  4. Two Oceans Aquatic S&S

    Two Oceans Aquatic S&S

    Joined:
    20 Feb 2011
    Posts:
    530
    Likes Received:
    6
    Location:
    Cape Town
    My 6 foot rimless tank has absolutely 0 bow
     
  5. leslie hempel

    leslie hempel Thread Starter Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,544
    Likes Received:
    285
    Location:
    Gonubie East London
    what thickness glass did you use trev? and was it starfire / and or laminate?
     
  6. LCornelius

    LCornelius Moderator

    Joined:
    5 Mar 2009
    Posts:
    5,460
    Likes Received:
    124
    Location:
    Durbanville (CPT)
    I'm tagging along. Would be good to know for my future tank!
    I have seen guys go 24mm laminated for tanks 2m and above
     
  7. gavster

    gavster

    Joined:
    4 May 2011
    Posts:
    233
    Likes Received:
    16
    Location:
    Durban
    Bow = trouble Les. I also had a bow on a big FW tank years back and had to brace it eventually as the silicone started splitting. Luckily I caught it in time.
     
  8. Two Oceans Aquatic S&S

    Two Oceans Aquatic S&S

    Joined:
    20 Feb 2011
    Posts:
    530
    Likes Received:
    6
    Location:
    Cape Town

    Les its slate and its 15mm, I think the height is also a factor mine is 700 with the water level at 680

    Trev
     
    Last edited: 14 Jun 2011
  9. nico.m.ferreira

    nico.m.ferreira

    Joined:
    18 Mar 2009
    Posts:
    259
    Likes Received:
    0
    Location:
    Pretoria/Centurion
    Personally I wouldn't trust any bowl
     
  10. CraigPeter

    CraigPeter

    Joined:
    15 Jun 2011
    Posts:
    44
    Likes Received:
    0
    Location:
    Grahamstown
    Not nice Leslie. My little old 100 l corner tank does this and has for many years. I have added corner braces that improved the situation but the bulge is pretty obvious.
     
  11. leslie hempel

    leslie hempel Thread Starter Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,544
    Likes Received:
    285
    Location:
    Gonubie East London

    Trev i dont understand it..

    my tank is 1.5m 650 high with a waterlevel of 580.. also in 15mm
     
  12. leslie hempel

    leslie hempel Thread Starter Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,544
    Likes Received:
    285
    Location:
    Gonubie East London
    thanks for the input guys..
     
  13. Two Oceans Aquatic S&S

    Two Oceans Aquatic S&S

    Joined:
    20 Feb 2011
    Posts:
    530
    Likes Received:
    6
    Location:
    Cape Town

    Thats weird hey, is it perhaps white glass ?
     
  14. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    Also got a bow on mines Les..... Very little though. Im skrik as hell :p
     
  15. Nemos Janitor

    Nemos Janitor

    Joined:
    7 Feb 2009
    Posts:
    8,384
    Likes Received:
    286
    Location:
    Joe's Mountain
    We have got Hundreds of tanks out there. All bow. We know this because most of our installations have cabinetry, and the cabinet makers/shop fitters complain when the do not listen to us and make the cabinet according to an empty tank only to find out that when the tank is filled, the bow creates gaps which means a refit.

    If your tank is constructed with the correct gauge of glass do not worry.
     
  16. leslie hempel

    leslie hempel Thread Starter Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,544
    Likes Received:
    285
    Location:
    Gonubie East London
    normal float.. i went with this because of expense and strength over "white glass"

    comforting.. not :) at least im not alone...

    good info Keith somewhat relieving..

    i made sure all structural seams were bonded with Den black.. as it is tried and tested.. glass was hellish overspec whe it stood dry and i was well in a comfort zone..

    i saw a little tension form on one seam neat the top where the tank front bonds to the side, i have marked it for monitoring.. but overall i am concerned from a safety aspect.. being a parent and having little unpredictables around doesnt ensure even a bullet proof tank..

    im in my 3rd day, usually things go wrong if they are going to on that day.. so lets see..

    if the 19mm was easily obtainable i would replace without hesitation but im not too happy about having a 4mm lip over the edge at the bottom either as i thing 19mm being heavy would stress the base piece..

    am i being over-analytical ??????
     
  17. Nemos Janitor

    Nemos Janitor

    Joined:
    7 Feb 2009
    Posts:
    8,384
    Likes Received:
    286
    Location:
    Joe's Mountain
    How long did you allow for the silicone to dry/set?
     
  18. leslie hempel

    leslie hempel Thread Starter Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,544
    Likes Received:
    285
    Location:
    Gonubie East London

    well i filled her up 2 weeks ago and i started the build in Feb.. so i reckon i well dried by now..
     
  19. Nemos Janitor

    Nemos Janitor

    Joined:
    7 Feb 2009
    Posts:
    8,384
    Likes Received:
    286
    Location:
    Joe's Mountain
    Ok

    Have that beer. :)
     
  20. leslie hempel

    leslie hempel Thread Starter Moderator MASA Contributor

    Joined:
    7 May 2007
    Posts:
    14,544
    Likes Received:
    285
    Location:
    Gonubie East London
    :)
     
  21. jonno

    jonno

    Joined:
    12 Apr 2011
    Posts:
    107
    Likes Received:
    0
    Location:
    east london
    ive got a 1.5m x 600 x 600 in 10mm and have done the euro bracing at the bottom and only 2 strips on the top sides, so you could say the front and back 1.5m lengths are rimless ontop i havent put water in yet but reading through this thread has made me very nervous, i think some extra bracing is in order!! sorry 4 hijacking
     
    Last edited by a moderator: 15 Jun 2011
Recent Posts

Loading...
Similar Threads - acceptable rimless tank Forum Date
Water parameters acceptable Beginner Discussions 6 Mar 2014
Acceptable aquarium decor The Sump 14 Sep 2011
Rimless tank General Discussions and Advice 8 May 2015
My 237L StarFire Rimless Reef Medium Tanks 17 Apr 2015
Rimless Starfire tank planning General Discussions and Advice 28 Mar 2015
changing canopy to look like rimless General Discussions and Advice 23 Sep 2014
Nathan's 200L Starfire Rimless tank Medium Tanks 15 Jan 2014