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http://indianaquariumhobbyist.com/community/ :: View topic - Stray Current in tank
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Stray Current in tank

 
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oscar-lover
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PostPosted: Sat Jun 16, 2007 9:39 pm Post subject: Stray Current in tank Reply with quote

 Hello  Guys,
 
 Today  morning  as  usual  went  on  to  feed  my  65  gallon  tank  inhabitants  which  includes  2  Red  Oscars  and  assorted  Malawi  cichlids.  While  feeding  i  put  my  fingers  into  the  tank  and  was  able  to  feel  a  slight  currect  in  the  water,  it  was  a  bit  hard  for  me  to  hold  in  my  fingers  for  a  long  time  because  it  was  too  strong,  the  fish  seems  to  be  not  bothered  about  it  and  are  in  their  usual  charm.
 
 I  am  using  a  Atman  2000  Ltr/Hr  internal  filterwhich  is  about  2  years  old,  the  filter  is  running  fine  visibly.  As  anybody  faced  this  kinda  situation  before.  Is  there  a  way  i  can  manage  this  without  changing  the  filter  itself  (can  any  possible  repair  be  done  on  the  filter),  would  the  fishes  be  affected  on  a  long  run.  KIndly  Advice.
 
 Cheers
 Ravindran
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Madan
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PostPosted: Sat Jun 16, 2007 9:44 pm Post subject: Re: Stray Current in tank Reply with quote

 Fish  will  not  feel  it.
 
 The  current  has  to  be  earthed  for  them  to  feel  it.
 
 You  feel  it  as  the  current  passes  through  your  fingers  and  down  to  earth.
 
 Two  of  my  tanks  have  the  same  problem  for  the  past  month  or  so.  The  only  one  who  has  to  be  careful  are  the  people  outside  the  tank.
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oscar-lover
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PostPosted: Sat Jun 16, 2007 10:01 pm Post subject: Re: Stray Current in tank Reply with quote

 Thats  excatly  rigth  Mr  Madan,  i  can  feel  the  currect  in  my  fingers  and  its  continuous,  the  moment  i  unplug  the  filter  the  current  is  gone....had  a  crazy  thought  if  had  to  buy  some  kinda  stabilizer  or  adapter  of  some  sort  to  plug  in  the  filter  first  and  then  to  the  main.
 
 I  am  happy  that  the  fish  dont  feel  it..Please  do  let  me  know  if  you  have  found  out  a  solution  for  your  problem.   Smile  
 
 Cheers
 Ravindran
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Madan
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PostPosted: Sat Jun 16, 2007 10:50 pm Post subject: Re: Stray Current in tank Reply with quote

 Throw  the  filter  out.
 
 My  problem   is  my  light  fitting  which  is  earthing  through  the  aquarium.  I'll  have  to  check  teh  wiring  one  day.
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saikumar
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PostPosted: Sat Jun 16, 2007 10:52 pm Post subject: Re: Stray Current in tank Reply with quote

 i  guess  only  a  current  leak  in  the  filter  powerhead  could  cause  the  problem.
 
 stabalizer  nd  adapter  may  not  help  u  in  such  a  case.
 
 saikumar
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Deepak_Brid
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PostPosted: Sun Jun 17, 2007 1:04 am Post subject: Re: Stray Current in tank Reply with quote

                                                   
oscar-lover  wrote  (View  Post):                
I  am  using  a  Atman  2000  Ltr/Hr  internal  filterwhich  is  about  2  years  old,  the  filter  is  running  fine  visibly.  As  anybody  faced  this  kinda  situation  before.  Is  there  a  way  i  can  manage  this  without  changing  the  filter  itself  (can  any  possible  repair  be  done  on  the  filter),  would  the  fishes  be  affected  on  a  long  run.  KIndly  Advice.                

 
 
 Hi  Ravindran,
 
 With  Internal  power  heads  (PH)  having  Metal  Spindle,  when  undergoes  frequent  power  cycles  &  power  surges  it  rattles  the  impeller  during  the  initial  startup.  This  behavior  when  repeated  time-on-time  eats  up  into  the  metallic  spindle  &  puts  the  impeller  off  center,  which  in  turn  rubs  against  the  Impeller  housing.  This  leads  to  slow  wear  of  the  housing  exposing  the  induction  unit  (that  produces  the  magnetic  field)  to  the  water  column.  As  the  induction  unit  is  made  of  metal  -  mild  current  starts  leaking.
 
 The  same  has  a  remote  possibility  when  the  spindle  is  made  of  ceramic  -  as  it  will  take  a  much…..  longer  for  a  ceramic  spindle  to  be  eaten  into,  probably  may  not  even  show  signs  of  wear  &  tear.  In  some  scenarios  -  the  spindle  might  break  by  the  sudden  jolts  or  rattling  (which  also  happens  to  be  a  warning  indication  of  something  is  not  right)  there  by  increasing  the  life  expectancy  of  the  power  head,  pump  or  any  filter  head  (by  not  eating  into  the  impeller  housing).
 
 Besides  this,  the  mains  wire  that's  entering  the  power  head  could  also  be  cut/faulty  at  some  place  -  check  for  this  too.
 
 So,  IMO  there  is  no  way  you  can  repair  this.  Least  you  can  do  is  turn  off  the  PH  if  you  want  to  touch  the  water.  To  avoid  any  accidents  it's  best  to  replace  it  with  a  new  PH  â€“  now  with  a  ceramic  spindle.Smile
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rgg
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PostPosted: Mon Jun 18, 2007 11:28 am Post subject: Re: Stray Current in tank Reply with quote

 Hi  Folks,
   This  is  again  off  topic,  But  a  good  learning  for  me  especially  handling  T5's   Ho's,  MH's  and  other  light  fixtures.
 
   Note  that  the  high  drive  ballasts  would  always  have  3  pins  and  are  3  phased.  Now  one  can  wire  the  ballast  ignoring  the  ground  just  to  save  a  few  feet  of  wire.
 
   I  due  to  ignorance  and  having  adequate  knowledge  on  this  did  the  wiring  without  earthing.  And  this  did  lead  to  leake  in  the  ballast  and  due  to  custom  designing  of  ballast  some  where  the  ballast  sheild  started  leaking  power.  This  would  have  been  fatal  otherwise.
 
 Lesson  learnt:  Better  use  3  phase  wiring  for  high  power  Circuits.  Even  if  the  3rd  phase  is  not  provided  to  a  high  power  circuit,  It  would  be  better  to  earth  the  sheild  of  the  electrical  equipment  in  use.  Which  would  save  us  from   a  power  leak  into  the  sheild.
 
 Raghu
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oscar-lover
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PostPosted: Mon Jun 18, 2007 7:41 pm Post subject: Re: Stray Current in tank Reply with quote

 @  aquadeep,  your  explanation  was  very  informative,  all  this  while  i  just  thought  there  is  a  big  motor  churning  out  those  water  circulations,  let  me  try  to  check  for  the  wiring  or  else  i  shall  go  ahead  and  replace  the  powerhead  itself  .
 
 Which  are  the  filter  makes  that  has  the  ceramic  spindles,  please  advice.   Thumb Up  
 
 Cheers
 Ravindran
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deepesh
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PostPosted: Mon Jun 18, 2007 8:11 pm Post subject: Re: Stray Current in tank Reply with quote

 I  would  say  that  if  you  are  feeling  the  current  pass  through  you  when  you  touch  the  water,  your  fish  are  definitely  feeling  it.
 
 They  are  fine  as  long  as  there  is  no  escape  for  the  current  to  the  earth  but  the  moment  you  touch  the  water  you  yourself  are  the  path  for  the  current  to  flow!  And  your  fish  feel  it  even  though  the  current  may  be  weak.
 
 Hats  off  to  you  though!  I  would  never  have  the  guts  to  find  out  how  long  I  would  be  able  to  hold  my  finger  under  water  thats  conducting  electricity.
 
 Tangentially  off  topic  but  there  is  something  real  known  as  electrofishing.
 
 deepesh
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rgg
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PostPosted: Tue Jun 19, 2007 10:20 am Post subject: Re: Stray Current in tank Reply with quote

 Ravi,
   The  best  filters  made  of  ceramics  to  my  little  knowledge  is  Eheim.
 
 Raghu
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