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http://indianaquariumhobbyist.com/community/ :: View topic - Oily layer on Water
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Oily layer on Water
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Saugata
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PostPosted: Mon Feb 27, 2006 10:19 am Post subject: Oily layer on Water Reply with quote

 Hi!  All,
 
 Yesterday  I  observed  a  kind  of  oily  layer  on  my  tank  water.  I  didn't  give  much  attention  to  it  felling  that  its  nothing  serious.  But  today  morning  both  my  Orandas  have  started  behaving  funnily  and  are  not  at  all  eating  anything.  Have  seperated  them  out  and  have  done  a  90%  water  change.  Have  also  stopped  the  CO2  injection  and  an  aeraor  has  also  been  switched  on.  Am  completely  at  loss  as  to  what  could  have  caused  this.  Any  suggestion  would  be  of  immense  help.
 
 My  tank  parameters:-
 
 Size  -20G
 Heavily  Planted
 W/c  40%  twice  a  week  as  I  am  having  Hair  Algae  problems.  Last  W/c  done  on  24/02/06
 Ferts-Only  KNO3  -  5  PPM  twice  a  week
 Lights-  72  watts  of  PLL  @  12  hrs
 CO2-  Pressurised  CO2  @  3  bubbles  per  sec
 REacror-Dymax  reactor
 Filter-Eheim  2224  Professional
 The  whole  setup  is  about  an  year  old.
 
 Looking  forward  to  your  help.
 
 Regards,
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nag
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PostPosted: Mon Feb 27, 2006 3:02 pm Post subject:  Reply with quote

 Hi  Saugata:
 
 This  surface  layer  is  pretty  common  and  likely  a  result  of  biological  processes  in  the  tank,  esp.  when  the  water  is  in  a  stand  still  condition  and  the  water  surface  stays  un-disturbed...no  need  to  worry...(though  the  fishes  not  eating  is  a  question,...Confused)...ensure  that  the  water  surface  stays  agitated...
 Bye,
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Saugata
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PostPosted: Mon Feb 27, 2006 3:08 pm Post subject:  Reply with quote

 Hi!  Nag,
 
 Thanks  for  your  reply.  Well,  there  is  some  amount  of  water  movement  both  on  the  surface  as  well  as  below.  This  is  because  of  the  spray  bar  of  the  canister  filter  as  well  as  the  CO2  reactor  from  which  water  comes  out  and  ensures  that  there  is  enough  movement.  However,  I  can't  go  for  too  much  movement  on  the  surface  as  then  the  CO2  that  is  being  injected  will  escape  &  the  plants  will  not  be  able  to  utilise  it.
 
 Any  more  suggestions  from  your  side.
 
 Regards,
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aquascapes
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PostPosted: Mon Feb 27, 2006 3:22 pm Post subject:  Reply with quote

                                                   
Quote:                
Last  W/c  done  on  24/02/06                  

 
                                                 
Quote:                
have  done  a  90%  water  change                

 Is  the  oily  film  still  there  after  the  90%  WC?
 If  yes  I'd  suggest  you  dip  an  empty  glass  in  the  tank  and  collect  the  surface  layer  and  get  it  analysed.
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Saugata
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PostPosted: Mon Feb 27, 2006 4:25 pm Post subject:  Reply with quote

 Well,  I  am  in  office  right  now.  Will  go  back  &  check  and  then  come  back  to  you.
 
 Regards,
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aquascapes
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PostPosted: Mon Feb 27, 2006 4:36 pm Post subject:  Reply with quote

 I  had  a  thick  slimy  layer  on  the  surface  of  my  tank  when  I  got  my  furniture  treated  with  PU  -  the  vapour  had  condensed  on  the  water  surface    Surprised    It  was  a  hard  job  cleaning  the  tank  and  had  to  strip  the  whole  tank  Sad
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Saugata
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PostPosted: Tue Feb 28, 2006 11:45 am Post subject:  Reply with quote

 Had  placed  the  spray  bar  a  little  above  the  water  surface  to  cause  some  surface  movement.  The  oily  layer  seems  to  have  vanished.
 
 Regards,
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aquascapes
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PostPosted: Tue Feb 28, 2006 6:37 pm Post subject:  Reply with quote

 can  it  be  possible  that  something  got  leached  into  the  tank  when  you  last  changed  the  water?  I  mean  something  in  the  pipe?  New  flexible  pipes  come  with  an  oily  film  on  them  (just  a  wild  guess)
 Anyways,  happy  to  know  that  your  problem  is  solved!
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nag
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PostPosted: Tue Feb 28, 2006 10:48 pm Post subject:  Reply with quote

                                                   
Saugata  wrote:                
...placed  the  spray  bar  a  little  above  the  water  surface...                

 Exact  thoughts,  well  implemented...  Smile
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ravindranak
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PostPosted: Wed Mar 01, 2006 7:43 am Post subject:  Reply with quote

 could  it  be  because  of  uneaten  poor  quality  fish  food  ?  because  i  seemed  to  have  a  similar  problem  with  this  oily  surface  and  bubbles  getting  stuck  on  the  surface  ...seemed  to  turn  out  fine  when  i  started  siphoning  out  the  uneaten  food  and  waste  and  changing  my  fish  food  .but  then  again  .it  could  be  because  of  my  pipe  too.will  let  you  know  after  my  next  WC
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pandian
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PostPosted: Wed Mar 01, 2006 10:18 am Post subject:  Reply with quote

 i  have  meet  some  situation  like  this  which  charged  my  life  of  4  sharks......
 
 
 there  was  some  oil  like  layer  if  thing  in  the  tank  water....
 
 
 later  i  found  it  to  me  the  oil  from  the  compress  pump..........  that  has  mixed  with  the  water  pumped  out....
 
 to  prevent  this  i  now  use  water  from  over  head  tank  and  first  i  use  to  use  water  straight  form  the    pump.....
 
 but  i  am  not  sure    whether  this  is  the  reason.....for  your  tank  oil  like  flim...
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sandeepraghuvanshi
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PostPosted: Wed Mar 01, 2006 10:50 am Post subject:  Reply with quote

 Hi  Saugata
 Kindly  check  the  nitrate  levels  in  your  tank.  Oily  layer  on  surface  and  fishes  getting  distressed  can  be  a  symptom  of  High  nitrate  levels.
 Anyway  water  changes  would  have  taken  care  of  it.
 Imo  if  you  are  using  fertlizers  nitrate  testing  becomes  important.
 Regards
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Saugata
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PostPosted: Wed Mar 01, 2006 11:01 am Post subject:  Reply with quote

 Hi!  Sandeep,
 
 I  do  check  Nitrate  level  on  a  regular  basis.  The  Nitrate  level  generally  ranges  between  5  to  20  PPM.  I  guess  this  is  ok  enough.
 
 Regards,
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sandeepraghuvanshi
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PostPosted: Wed Mar 01, 2006 11:55 am Post subject:  Reply with quote

 Which  test  kit  do  you  use?
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Saugata
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PostPosted: Wed Mar 01, 2006 12:02 pm Post subject:  Reply with quote

 Test  Kits  from  Aquarium  Pharmaceuticals,  US.  These  are  liquid  test  kits  &  not  strip  tests.
 
 Regards,
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