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http://indianaquariumhobbyist.com/community/ :: View topic - Minimum thickness of Styrofoam for 3ft tank
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Minimum thickness of Styrofoam for 3ft tank

 
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hems
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PostPosted: Fri Oct 22, 2010 3:20 pm Post subject: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 Hi  All,
 
 Currently  I  am  having  36"x  15"  x  18"  tank,  just  wanted  to  know  how  much  thick  styrofoam  should  I  use  to  keep  it.  I  want  to  know  minimum  thickness.  
 Thickness  of   8mm  is  OK???
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sandeepraghuvanshi
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PostPosted: Fri Oct 22, 2010 3:51 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 I  am  using  1/2  inch  sheet  for  a  tank  of  same  size  ,  which  is  about  12.5mm,  8  mm  might  be  too  thin.
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hems
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PostPosted: Fri Oct 22, 2010 5:59 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 While  surfing  this  site  I  came  across  this  topic  
 
 
 
 Substitute  for  Polystyrene  (Thermocol)  as  Aquarium  Base.
 
 
                                                 
Nawed  wrote  (View  Post):                
If  you've  ever  been  to  kurla  fish  market  then  quite  close  to  it  is  a  rubber/foam  sheet  wholesale  market  (the  kinda  stuff  they  use  to  make  chappals  and  floaters)  i  bought  5  sheets  and  use  them  as  a  base  for  my  aquairums...  tough+durable+CHEAP!                

 
 
 Can  anyone  confirm  is  it  safe  or  not?????
 
 
 Or  Can  I  use  plywood  as  base????
 I  am  looking  for  alternative  for  thermacol  as  I  have  hight  problem  with  my  new  rack,  I  need  thin  base  for  my  aquarium.
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loaches-n-tetras
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PostPosted: Sat Oct 23, 2010 8:22 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 correct  me  if  i  am  wrong  folks...
 thermocol/  styrofoam  is  used  a  a  base  for  the  tank  to  dampen  any  vibrations  that  may  occur  and  reverberate  in  the  glass  causing  it  to  crack.   anything  that  sets  off  such  a  vibration  should  ideally  not  happen.   if  the  sheet  below  the  tank  is  too  thick  the  dampening  may  actually  aid  the  vibration  itself  and  cause  the  glass  to  crack.   so  i  guess  it  should  be  rather  thin.   i  would,  at  the  most,  put  in  a  1/2  inch  sheet  (which  is  actually  less  than  than  that  when  purchased).  this  then  gets  compressed  by  the  weight  of  the  tank,  water,  sand  &  gravel,  stones,  etc.,  etc.  to  an  even  thinner  value.   i  have  a  1/2  inch  sheet  under  my  60  (L)  x  15  (D)  x  20  (H)  12mm  glass  (all  sides)  tank.   its  actually  become  a  little  over  1/3  of  an  inch  after  the  last  3  years  ;-)
 
 plywood  should  certainly  NOT  be  used  since  the  purpose  would  be  completely  defeated
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Mortis
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PostPosted: Sun Oct 24, 2010 6:03 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 It  is  not  for  vibration,  although  it  might  help  a  bit.  It  just  helps  in  providing  an  even  flat  base  for  the  tank  which  prevents  cracking
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loaches-n-tetras
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PostPosted: Sun Oct 24, 2010 6:33 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 Hello  Mortis,
 thanks  for  the  input,  but  i  need  to  get  my  fundas  straight,  at  this  point.   if  you  say  it  is  only  to  make  an  even  flat  base  why  not  just  put  a  sheet  of  plywood  or  stone  slab?   havent  heard  of  anyone  placing  a  tank  on  such  a  surface  directly.   many  who  design  their  new  homes  keep  a  designated  place  for  the  tank  often  made  with  a  stone  slab;  but  always  place  thermocol  under  the  tank.   maybe  the  compression  levels  things  off?
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PostPosted: Sun Oct 24, 2010 6:54 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

                                                   
loaches-n-tetras  wrote  (View  Post):                
maybe  the  compression  levels  things  off?                

 
 YeP!  you  are  right  now.
 
 Thats  because  of  2  things  Tank  bottom  edges  might  not  uniform  all  over  and  secondly  not  slabs  nor  wood  would  suit  the  flatness  of  glass  you  have  or  vice-versa.  
 
 Cheers!
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sandeepraghuvanshi
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PostPosted: Mon Oct 25, 2010 9:48 am Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

                                                   
loaches-n-tetras  wrote  (View  Post):                
Hello  Mortis,
 thanks  for  the  input,  but  i  need  to  get  my  fundas  straight,  at  this  point.   if  you  say  it  is  only  to  make  an  even  flat  base  why  not  just  put  a  sheet  of  plywood  or  stone  slab?   havent  heard  of  anyone  placing  a  tank  on  such  a  surface  directly.   many  who  design  their  new  homes  keep  a  designated  place  for  the  tank  often  made  with  a  stone  slab;  but  always  place  thermocol  under  the  tank.   maybe  the  compression  levels  things  off?                

 
 Glass  is  a  substance  which  has  no  elasticity  at  all,  this  makes  it  very  brittle.
 Even  a  slight  imperfection  in  the  surface  on  which  glass  is  placed  will  break  the  glass.
 it  is  very  difficult  to  get  a  very  smooth  surface  for  placing  glass.
 In  order  to  prevent  any  stress  buildup  on  glass  bottom  ,  a  thermocol  sheet  is  used.
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PostPosted: Mon Oct 25, 2010 10:11 am Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 If  it  is  a  wooden  stand  you  are  using,  then  use  a  sand  paper  to  smoothen  the  surface  of  stand,  it  will  take  out  some  imperfections.
 Your  tank  will  contain  approx  160  lit  of  water,  add  another  20  kg  for  substrate  etc.
 The  total  weight  on  the  base  of  tank  will  be  about  180kg,  which  is  considerable.
 On  a  personal  level  i  will  not  use  a  thinner  sheet  of  thermocole.
 I  have  broken  a  similar  sized  aquarium  earlier,  which  was  on  a  8  mm  thermocole  sheet.  The  mess  caused  is  unbelievable,  the  only  saving  grace  is  that  it  had  no  livestock.
 My  better  half  does  not  let  me  forget  the  episode,  after  all  I  ruined  her  favourite  carpet.  Very Happy
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essabee
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PostPosted: Mon Oct 25, 2010 10:28 am Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 You  use  Styrofoam,  Cork-sheet,  or  any  other  compressible  sheet  to  prevent  the  formation  of  pressure  points  under  the  glass  bottom  of  your  tank.  A  pressure  point  acts  like  a  fulcrum  dividing  the  weight  of  the  tank  around  its  contact  point.  This  leads  to  cracking  of  the  glass  because  of  the  weights  at  play.
 
 The  thickness  of  the  compressible  sheet  never  needs  to  be  more  than  twice  the  height  of  the  pressure  point  after  the  compression  of  the  sheet.  As  the  weight  of  the  tank  is  spread  all  over  the  sheet,  the  compression  of  the  sheet  will  be  related  to  the  height  of  the  tank  and  not  the  size  of  the  base,  ie  the  pressure  and  not  the  thrust.
 
 The  imperfections  that  we  are  dealing  with  are  very  minor  in  height  and  therefore  for  a  2  feet  high  tank;  a  quarter  inch  thick  Styrofoam  sheet  should  suffice  -  unless  off-course  the  stand  is  highly  imperfect  (and  in  that  case  your  tank  is  will  be  highly  unstable).


Last edited by essabee on Tue Oct 26, 2010 6:02 am; edited 1 time in total
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PostPosted: Mon Oct 25, 2010 1:23 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 thank  you  all  for  your  feedback,
 finally  I  took  decision  to  go  for  Rubber  sheet  (size  10  MM)  hope  it  works  good.
 Came  across  this  topic
 
                                                 
Nawed  wrote  (View  Post):                
If  you've  ever  been  to  kurla  fish  market  then  quite  close  to  it  is  a  rubber/foam  sheet  wholesale  market  (the  kinda  stuff  they  use  to  make  chappals  and  floaters)  i  bought  5  sheets  and  use  them  as  a  base  for  my  aquairums...  tough+durable+CHEAP!                

 On  Saturday  I  went  to  Kurla  fish  market  I  saw  many  of  the  new  shopkeepers  using  those  sheets  as  aquarium  base.
 So  I  purchased  it,  will  update  you  guys  with  photos.
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loaches-n-tetras
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PostPosted: Mon Oct 25, 2010 1:37 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 Thanks  guys,
 that  about  clears  up  any  issues  i  had  about  the  thermocol.   i  guess  i  pretty  much  had  most  points  covered  but  they  were  not  so  academically  arranged.   i  appreciate  it.
 
 but  Essabee,  i  have  another  doubt:  can  we  place  an  inch  think  sheet  under  any  and  all  tanks?   or  in  other  words  can  there  ever  be  a  "too  thick"  sheet  of  thermocol  placed  below  the  tank?   (i  cant  imagine  anyone  ever  getting  more  than  1  inch  thick  sheet  for  even  an  8-10  footer)
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PostPosted: Tue Oct 26, 2010 6:15 am Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

                                                   
loaches-n-tetras  wrote  (View  Post):                

 but  Essabee,  i  have  another  doubt:  can  we  place  an  inch  think  sheet  under  any  and  all  tanks?   or  in  other  words  can  there  ever  be  a  "too  thick"  sheet  of  thermocol  placed  below  the  tank?   (i  cant  imagine  anyone  ever  getting  more  than  1  inch  thick  sheet  for  even  an  8-10  footer)                

 
 Inch  thick  should  not  be  any  problem.  The  problem  with  thicker  thermocol  sheets  is  that,  unless  you  cover  the  edges,  the  normal  room  cleaning  process  will  erode  the  sheet.  After  some  time  you  might  find  the  tank  edges  un-supported.  So  you  should  use  at  least  some  scotch-tape  (slightly  wider  than  the  sheet  thickness  so  that  it  sticks  to  the  aquarium  glass)  all  along  the  bottom  perimeter  to  avoid  that  happening.
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PostPosted: Tue Oct 26, 2010 2:16 pm Post subject: Re: Minimum thickness of Styrofoam for 3ft tank Reply with quote

 thanks  for  the  scotch  tape  idea.   never  thought  of  that  since  my  thermocol  sheet  has  always  been  below  the  level  of  the  metal  stand's  rim  and  is  usually  not  damaged  at  all.   the  glass  base  is  a  little  shorter  than  the  metal  too  so  the  2  never  meet.
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