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http://indianaquariumhobbyist.com/community/ :: View topic - DIY EXTERNAL CANISTER FILTER
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DIY EXTERNAL CANISTER FILTER
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shishirkamat
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Posts: 557
Location: Belgaum Karnataka

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PostPosted: Thu Dec 23, 2004 7:08 pm Post subject: DIY EXTERNAL CANISTER FILTER Reply with quote

 Hello  Friends,
 I  have  recently  constructed  an  external  canister  filter  for  my  six  feet  tank  which  is  very  cost  effective  and  running  exceptionaly  well,Iwould  like  to  share  this  design  with  all  of  you.
 This  filter  is  mounted  horizontally  on  back  side  of  the  hood,the  material  required  is  as  follows
 1)1  no  PVC  pipe  of  3inch  dia  and  length  1.5  feet,2  nos  adapters(external  threaded)2nos  end  caps  to  seal  the  pipe  at  both  ends,2  nos  of  1/2  inch  nozzle  fitted  at  each  end  by  drilling  the  end  caps,flexible  pipe  of  1/2  inch  to  connect  the  pump  and  the  filter,teflon  tape
 2)1  no  power  head(  Ihave  used  BOYU  make  s1000)this  circulates  900  ltrs  of  water  per  hour  and  is  only  7  watt
 3)Filter  media(I  have  used  coarse  sponge,dish  washing  plastic  bundles,Activated  carbon  and  nylon  floss  for  filtration)you  can  also  experiment  with  media  of  your  choice
 Assemble  the  filter  and  clamp  it  to  the  hood  by  drilling  2  holes  and  clamp  it  with  binding  wire,connect  the  power  head  to  the  filter  with  1/2  inch  pipe  at  the  inlet  and  also  the  other  end  back  to  the  tank
 Advantages-The  filter  is  neatly  positioned  at  the  back  side  of  the  tank,No  problem  of  water  spillage  since  this  is  a  closed  circuit,and  very  low  operational  cost(only  7watts  per  hour  is  the  power  requirement)
 Cost-The  whole  filter  including  the  pump  has  cost  me  Rs  450  which  is  half  the  cost  of  a  good  internal  power  filter  and  1/10th  the  cost  of  an  external  canister  filter  of  reputed  make
 I  hope  this  is  understood,If  any  information  is  required  do  contact  me
 with  regards
 shishir  kamat
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ravi
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PostPosted: Thu Dec 23, 2004 8:34 pm Post subject:  Reply with quote

 Hi  Shishir,
 
 How  about  writing  a  detailed  article  &  posting  it  with  lot's  of  pictures  ?    Smile
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murthy
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PostPosted: Thu Dec 23, 2004 9:00 pm Post subject:  Reply with quote

 Thats  a  very  good  idea!Shishir,I  have  some  doubts  though.
 1.The  end  caps  have  to  be  sealed  with  PVC  adhesive?  fear  of  leakage  if  not.
 2.How  is  maintainance  done?once  the  end  caps  have  been  fixed  firmly(even  if  without  PVC  adhesive)...its  pretty  tough  to  pull  the  end  caps  out  for  a  monthly/bimonthly  cleaning  and  replacement  of  filter  media.
 3.My  knowledge  of  available  plumbing  materials  is  poor...but  is  it  possible  to  get  a  threaded  end  cap  on  one  side?Probably  a  washer  can  be  used  with  the  threaded  end  cap  to  ensure  proper  seal,and  removability  when  required.Other  end  can  be  permanently  sealed  and  forgotten!
 why  only  1.5  feet?  Very Happy  more  the  merrier!why  not  the  entire  six  foot  length?(lol....ok...lets  be  reasonable  maybe  3,4  feet?)
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shishirkamat
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PostPosted: Thu Dec 23, 2004 9:02 pm Post subject:  Reply with quote

 Hi  Ravi,
 I  will  upload  some  pictures  shortly
 with  regards
 shishir  kamat
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ravi
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PostPosted: Thu Dec 23, 2004 9:07 pm Post subject:  Reply with quote

 Hi  Shishir,
 
 Don't  forget  to  write  the  article.  See  Adi's  post.  We  need  lot  more  details.
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nag
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PostPosted: Thu Dec 23, 2004 9:16 pm Post subject:  Reply with quote

 Hi  Shishir:
 If  you're  in  Bangalore,  I'd  like  to  take  a  personal  look...
 Pls  PM  me  when  can  I  come  this  week  end...
 Thanks,
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shishirkamat
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PostPosted: Thu Dec 23, 2004 9:27 pm Post subject:  Reply with quote

 Hi  Adi,
 THe  end  caps  are  threaded  and  not  sealed  permanently.Both  the  ends  can  be  opened  for  cleaning  .The  two  adaptors  at  either  ends  are  glued  to  the  main  pipe  (the  adaptors  have  external  threadings  so  the  end  caps  are  mounted  on  these  adaptors.All  joints  are  tightened  with  Teflon  tape  to  ensure  no  leaks,since  the  pressure  is  quiet  less  on  the  joints  due  to  a  smaller  power  head  you  need  not  worry  about  leakages
 I  agree  the  length  can  be  increased  to  4  or  maybe  6  feet  ,more  the  merrier  but  then  the  cost  of  Activated  carbon  and  other  media  will  be  very  high  since  you  have  to  fill  up  that  long  pipe  Very Happy  ,Anyways  this  is  serving  the  purpose
 If  you  have  any  other  doubts  do  write  to  me
 with  regards
 shishir  kamat
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shishirkamat
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PostPosted: Thu Dec 23, 2004 9:32 pm Post subject:  Reply with quote

 Hi  Nag,
 Dear  guru  Very Happy  ,Iam  from  Belgaum  exactly  500  Km  from  bangalore,you  are  welcome  to  visit  me  if  you  happen  to  come  here
 with  regards
 shishir  kamat
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venki25
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PostPosted: Sat Dec 25, 2004 2:45 pm Post subject:  Reply with quote

 Hi  Shishir
 
 From  your  designs  i  guess  the  following;
 
 The  Powerhead  pumps  up  the  water  upwards  into  the  PVC  Wide  mouth  Tubing,  closed  on  both  ends  toghtly.  There  is  a  outpipe  which  drains  water  back  into  the  tank.
 
 But  honestly  i  think  this  is  more  like  your  internal  filter,  excepting  we  have  the  choice  of  media,  and  of  course  saves  a  lot  of  space  inside  the  tank.  I  think  this  filter  will  not  be  able  to  bio  filter  your  big  sized  tank.  A  Power  head  pumping  900  L  per  hour  is  not  going  to  perform  at  100%  eficiency.  Assuming  this  is  only  80%  means  the  circulation  is  only  about  700L.  Thereafter  the  Powerhead  pumps  water  upwards  and  where  again  the  efficiency  is  lost.  Assuming  the  Litre  rate  of  water  pumped  out  and  fallen  back  inside  is  only  450-  500  Litrs  which  is  around  the  actual  volume  (i  guess)  of  the  tank  -  which  is  too  little  for  large  chichlids.
 
 With  your  concept  i  think  you  must  design  a  similar  set  up  with  a  Heavy  Powerhead  of  around  2000  L  per  hour  and  providing  maximum  media  surface.
 
 Regards
 
 Venkatesh.
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shishirkamat
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PostPosted: Sat Dec 25, 2004 9:44 pm Post subject:  Reply with quote

 Hi  Venkatesh,
 Thanks  for  the  inputs,My  Idea  was  to  design  a  filter  with  lowest  possible  input  cost,A  filter  which  everybody  could  afford  .Here  the  efficiency  is  not  reduced  because  the  head  is  not  much(hardly  6  inches  above  the  power  head)Assuming  the  flow  rate  to  be  80%  the  water  circulation  will  be  720  liters  per  hour  which  is  about  3  times  the  tank  capacity,secondly  the  water  is  crystal  clear  even  after  a  week.Now  Venkatesh  what  more  do  you  expect  from  a  filter  which  costs  hardly  400  Rs  Very Happy  
 with  regards
 shishir  kamat
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praani
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PostPosted: Sun Dec 26, 2004 2:23 am Post subject:  Reply with quote

 Shishir  your  idea  seems  good.  It  would  be  more  clearer  for  the  rest  of  us  if  you  could  post  a  few  pictures.
 Cheers!
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shishirkamat
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PostPosted: Sun Dec 26, 2004 7:41 am Post subject:  Reply with quote

 Hi  Abhi,
 I    will  upload  some  pictures  shortly
 with  regards
 shishir  kamat
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venki25
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PostPosted: Mon Dec 27, 2004 12:08 pm Post subject:  Reply with quote

                                                   
shishirkamat  wrote:                
Hi  Venkatesh,
 Thanks  for  the  inputs,My  Idea  was  to  design  a  filter  with  lowest  possible  input  cost,A  filter  which  everybody  could  afford  .Here  the  efficiency  is  not  reduced  because  the  head  is  not  much(hardly  6  inches  above  the  power  head)Assuming  the  flow  rate  to  be  80%  the  water  circulation  will  be  720  liters  per  hour  which  is  about  3  times  the  tank  capacity,secondly  the  water  is  crystal  clear  even  after  a  week.Now  Venkatesh  what  more  do  you  expect  from  a  filter  which  costs  hardly  400  Rs  Very Happy  
 with  regards
 shishir  kamat                

 
 Yeah  shishir,  at  400  bucks  its  a  steal.  Great.  Post  pics.
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spartacus1979
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PostPosted: Wed Apr 20, 2005 7:00 pm Post subject:  Reply with quote

 Is  this  cost  with  the  filtration  media  or  without.  and  also  the  powerhead.  i've  seen  boyu  1000  for  500  bucks,  so  i  had  to  resist  buying  it.  Right  now  i  have  only  a  dolphin  filter  and  UG  plates  connected  to  an  air  pump.
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puneit
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PostPosted: Wed Apr 20, 2005 7:38 pm Post subject:  Reply with quote

                                                   
venki25  wrote:                
Hi  Shishir
 
 .  I  think  this  filter  will  not  be  able  to  bio  filter  your  big  sized  tank.
 
 With  your  concept  i  think  you  must  design  a  similar  set  up  with  a  Heavy  Powerhead  of  around  2000  L  per  hour  and  providing  maximum  media  surface.
 
                 

 
 What  can  be  the  possible  modification  according  to  you,  to  get  efficient  biological  filtration?  (lets  forget  cost  effectiveness  for  the  moment,  but  not  forgeting  Mr  Kamat's  design)
 Getting  a  powerful  pump,  is  it  Confused:    If  yes,  can  you  please  explain  how?
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