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http://indianaquariumhobbyist.com/community/ :: View topic - Something on the surface of water
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Something on the surface of water

 
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kingfisher
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PostPosted: Wed May 28, 2008 1:54 am Post subject: Something on the surface of water Reply with quote

 The  coat  on  the  water  is  removed  when  the  tank  is  overflown.  And  it  appears  in  a  day  or  two.  Aging  of  the  coat  makes  it  thicker  and  when  felt  with  hands,  it  feels  like  fine  sand.
 
 Pics  at
 http://s288.photobucket.com/albums/ll164/sweetkrishna/?action=view&current=DSC00557.jpg
 http://s288.photobucket.com/albums/ll164/sweetkrishna/?action=edit&current=DSC00558.jpg
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trevor
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PostPosted: Wed May 28, 2008 6:51 am Post subject: Re: Something on the surface of water Reply with quote

 Find  out  whether  the  coat  is  coming  from  the  atmosphere  or  from  the  water/substrate.
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kingfisher
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PostPosted: Wed May 28, 2008 9:29 am Post subject: Re: Something on the surface of water Reply with quote

 All  the  tanks  have  the  same  water  and  this  coat  forms  in  only  two  tanks.
 One  of  the  tank  is  barebottom  tank  with  lots  of  hideouts  for  my  breeding  J.Marleri  and  other  has  one  albino  Brichardi  with  gravel  and  locally  available  so  called  plant  substrate  from  LFS.
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psimhan
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PostPosted: Wed May 28, 2008 10:20 am Post subject: Re: Something on the surface of water Reply with quote

 Is  this  borewell  water?
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kingfisher
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PostPosted: Wed May 28, 2008 3:15 pm Post subject: Re: Something on the surface of water Reply with quote

 @  psimhan
   Â The  tanks  are  fed  only  with  borewell  water.
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psimhan
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PostPosted: Wed May 28, 2008 3:22 pm Post subject: Re: Something on the surface of water Reply with quote

 I  have  the  same  problem  in  my  house.  
 The  water  is  too  hard  and  after  being  still  for  a  couple  of  days  will  have  that  coating  on  it.  
 Stick  an  airstone  into  the  tank  and  you  wont  have  this  issue.
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kingfisher
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PostPosted: Wed May 28, 2008 3:31 pm Post subject: Re: Something on the surface of water Reply with quote

 Let  me  try  this  Psimhan.
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Seetharam
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PostPosted: Wed May 28, 2008 4:19 pm Post subject: Re: Something on the surface of water Reply with quote

 Same  problem  here.  Till  recently  we  never  used  to  get  borewell  water,  after  that  i  have  this  problem.
 
 @  Pradeep  -  Will  putting  an  airstone  make  this  coating  disappear?
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arupnandi1969
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PostPosted: Wed May 28, 2008 4:57 pm Post subject: Re: Something on the surface of water Reply with quote

 Air  sparging  will  make  it  disappear  to  the  naked  eye.  This  is  a  typical,  "nucleation  VS  growth"  problem.  Putting  an  airstone  quickly  removes  the  CO2  which  limits  growth  of  the  particles  by  allowing  more  "particle  nucleii"  to  form.  Additionally,  the  turbulence  ensures  that  the  partciles  stay  finely  dispersed  in  the  water  and  do  not  form  the  surface  film.
 
 The  reason  behind  the  formation  of  the  particles  is  because  underground  water,  being  at  "higher  than  atmospheric"  pressure  dissolves  more  CO2  and  can  dissolve  more  limestone  into  the  relatively  unstable  bicarbonate  form.  As  soon  as  that  water  is  pumped  out,  the  slow  reversible  reaction  converts  the  solube  bicarbonates  to  insoluble  carbonates.
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Shankar
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PostPosted: Wed May 28, 2008 5:09 pm Post subject: Re: Something on the surface of water Reply with quote

 Also  some  sort  of  surface  skimmer  coupled  to  a  hang-on,  top  or  external  filter  will  help.
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rasikanayak
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PostPosted: Wed May 28, 2008 5:11 pm Post subject: Re: Something on the surface of water Reply with quote

 Good  water  to  grow  vals,
 
 Nayak.
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Severumkid
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PostPosted: Wed May 28, 2008 5:18 pm Post subject: Re: Something on the surface of water Reply with quote

                                                   
arupnandi1969  wrote  (View  Post):                
Air  sparging  will  make  it  disappear  to  the  naked  eye.  This  is  a  typical,  "nucleation  VS  growth"  problem.  Putting  an  airstone  quickly  removes  the  CO2  which  limits  growth  of  the  particles  by  allowing  more  "particle  nucleii"  to  form.  Additionally,  the  turbulence  ensures  that  the  partciles  stay  finely  dispersed  in  the  water  and  do  not  form  the  surface  film.
 
 The  reason  behind  the  formation  of  the  particles  is  because  underground  water,  being  at  "higher  than  atmospheric"  pressure  dissolves  more  CO2  and  can  dissolve  more  limestone  into  the  relatively  unstable  bicarbonate  form.  As  soon  as  that  water  is  pumped  out,  the  slow  reversible  reaction  converts  the  solube  bicarbonates  to  insoluble  carbonates.                

 
 Whew....that  was  beyond  my  radars,  Arup...could  you  tell  me  is  it  harmful  to  my  tanks?  As  you  must  have  figured  out  by  now,  that  I  have  the  same  problem...I  use  sheets  of  paper  to  take  them  out  but  they  keep  coming  back.  I  hate  it  but  I  loose  all  the  time.   Cheer
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jeeyejee
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PostPosted: Wed May 28, 2008 6:22 pm Post subject: Re: Something on the surface of water Reply with quote

 I  had  this  problem,  when  I  was  residing  at  Kappad,  Calicut.
 If  it  is  the  same  problem,  Try  boiling  the  water,  and  you  will  find  residue  at  the  bottom  and  coating  on  the  top.  Your  Aluminium  and  plastic  buckets  will  also  show  some  growths  ,  if  they  are  in  constant  contact  with  this  water.-  check  for  this  on  your  bathroom/  fishroom  utensils.  If  you  cook  rice  in  this  water,  sometimes  you  will  get  yellowish  food.
 Not  good  for  fish,  but  not  thatmuch  harmfull.  Some  plants  will  do  well.  
 
 And  after  all,  Many  of  my  neighbours  had  this  problem,  and  many  of  them  got  Kidney  stone  Problems.  -  So  Avoid  Drinking  this  water.
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Supra
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PostPosted: Wed May 28, 2008 6:35 pm Post subject: Re: Something on the surface of water Reply with quote

 Hi  All,
 
 
                                                 
Seetharam  wrote  (View  Post):                

 Same  problem  here.  Till  recently  we  never  used  to  get  borewell  water,  after  that  i  have  this  problem.
                 

 
 Why  dont't  you  make  a  simple  sand  filter  out  of  an  old  20  Litre  Paint  drum,  if  the  issue  is  really  bad.
 
 Rgds
 Prabhu
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