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http://indianaquariumhobbyist.com/community/ :: View topic - Use of activated carbon in planted tanks
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Use of activated carbon in planted tanks

 
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rgg
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PostPosted: Tue Aug 29, 2006 11:46 pm Post subject: Use of activated carbon in planted tanks Reply with quote

 Hi  All,
   Came  across  many  sites  where  in  couple  of  them  suggest  using  AC  in  planted  tanks  to  remove  dangerous  substances  such  as  chlorine,  H2S,  bleach,  chloramine,  tin  and  of  course  odur.
 
 The  draw  back  of  this  being  it  removes  iron  but  is  ineffective  against  chelated  Iron   and  can  mildly  absorb  pottasium.  And  these  can  be  re-placed  by  PMDD.
 
 Can  some  one  help  me  understand  better  the  pro's  and  con's  of  using  this  in  planted  tanks.  If  its  only  effecting  K  and  Fe,  Does  just  PMDD  excessive  dosing  help.
 
 
 
 Raghu
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PostPosted: Wed Aug 30, 2006 8:56 am Post subject: Re: Use of activated carbon in planted tanks Reply with quote

 Dear  Raghu
 
 The  adsorbtion  is  really  dependent  on  type  and  state  of  activatated  charcole  which  varies  from  brand  to  brand.  In  my  experience  it  reduced  the  Fe  level  very  fast.  I  was  using  chealeted  Fe  from  Haifa.  Plants  growth  will  hamper  due  to  lack  of  Fe.
 
 Regards
 
 PRADEEP
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rgg
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PostPosted: Wed Aug 30, 2006 11:47 am Post subject: Re: Use of activated carbon in planted tanks Reply with quote

 Hi,
   I  have  the  AC  from  Boyu,  And  it  mentions  that  AC  is  in-effective  on  chelated  Fe,  But  will  mildly  absorb  pottasium.
    The  question  that  i  have  is  if  this  just  absorbs  these,  Does  increasing  PMDD  counter  the  lack  of  trace  elements  when  we  use  AC.
 
 
 Raghu
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nag
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PostPosted: Wed Aug 30, 2006 2:50 pm Post subject: Re: Use of activated carbon in planted tanks Reply with quote

 Hi  Raghu:
 
 Though  AC  will  adsorb  most  nutrients  in  fertz.,  it  does  it  for  a  very  short  period  of  time...That  too,  when  it  is  used  new  (fresh  from  the  box/pack)...it's  effect  will  be  felt  for  a  period  of  five  to  seven  days  max.
 
 Hence,  by  simply  having  it  inside  the  filter  with  prolonged  contact  will  do  no  harm  at  all...
 
 So,  if  the  AC  is  old  by  this  time,  you  can  put  your  mind  to  rest...it  might  just  be  harbouring  beneficial  bacteria  (in  case  of  a  non-planted  tank)  and  in  a  planted  tank  it  might  be  acting  as  a  mechanical  filter  media...
 
 Coming  to  your  Q,  if  you've  using  AC  in  an  established  planted  tank,  then  the  question  of  dosing  parameters  will  arise...Well,  in  that  case,  you  can  adequately  use  chelated  Fe  and  other  elements...
 Bye,
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rgg
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PostPosted: Wed Aug 30, 2006 4:12 pm Post subject: Re: Use of activated carbon in planted tanks Reply with quote

 Hi  Nag,
   I  understand  the  usage  of  AC,  I  know  that  its  life  would  be  week  to  10  days  and  a  yellow  tint  in  water  indicates  that  its  time  to  replace  it.  And  should  be  used  in  quantities  of  50  -75  gms  of  it  for  50G.  Might  be  Different  for  different  setups,  and  should  be  changed  frequently.
 
   What  i  am  looking  at  it  is  the  benifits  that  AC  gives  me  and  i  am  looking  at  replacing  it  regularly  may  be  once  every  month  in  a  planted  tank.
 
    Can  we  still  do  this  to  eradicate  the  pollutant  compounds  and  dose  PMDD  in  slight  excess  and  still  get  a  healthy  plant  growth.
 
 
 Raghu
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PostPosted: Wed Aug 30, 2006 5:10 pm Post subject: Re: Use of activated carbon in planted tanks Reply with quote

 Raghu  what  pollutants  in  particular  are  you  referring  to  in  a  planted  tank?
 
 If  it  is  discoloration  of  the  water  you  want  to  eliminate,  it  may  be  due  to  green  water  and  unicellular  algae  which  will  not  be  eliminated  by  AC.  Adding  AC  to  your  filter  will  sequester  Fe  and  other  micros,  cause  an  imbalance  and  increase  other  types  of  algae.
 
 If  it  is  tannins  released  by  driftwood,  IMO  it  does  no  harm.
 
 Any  ammonia  from  fish  wastes  etc.,  is  immediately  lapped  up  by  the  plants,  AC  again  is  not  required.
 
 AC  will  not  absorb,  nitrites  or  nitrates.
 
 It  makes  sense  to  identify  the  root  cause  of  the  pollutants  that  are  bothering  you  and  eliminate  the  source  rather  than  treat  the  symptoms  with  AC.
 
 Planted  tanks  with  PMDD  addition  anyway  get  a  50%  water  change  or  thereabouts  weekly,  so  the  degree  of  pollutants  being  high  is  near  zero.
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PostPosted: Thu Aug 31, 2006 10:04 am Post subject: Re: Use of activated carbon in planted tanks Reply with quote

 Hi  Madan,
   What  i  was  looking  at  was,  to  remove  the  following  in  one  go.
 
   Bleach,  chloramine,  chlorine,  coloury  water  due  to  tannin's,  odors  and  some  times  gas  dissolved  in  water.
 
   The  water  that  i  am  receiving  in  borewell  is  sluggish  now  a  days,  Also  the  water  from  munciple  side  is  added  with  too  much  of  bleach  /  chlorine  /  chloramine.  And  more  often  they  get  mixed  in  my  over  head  tank.
 
 Also  the  driftwood's  acidic  nature  and  its  coloury  water  looks  very  ugly  some  times.
 
 Hence  i  was  looking  at  eliminating  these  in  one  go  which  is  hassle  free  so  was  looking  out  for  options.
 
 So  was  wondering  if  just  overdosage  can  take  care  of  Fe  and  K  Â diffitiancy  when  adding  AC,  Why  not  live  with  this.  Rather  than  the  conventional  method  of  hypo,  Aeriation  /  storage  of  water,  This  is  especially  for  2  of  my  tanks  which  on  a  50%  weekly  water  change  is  a  lot  to  do.  And  a  lot  to  store.
 
 Please  do  let  me  know  your  opinion  on  this.  If  its  not  worth  the  try  then  would  have  to  live  with  the  conventional  method  of  storage  /  hypo  /  etc  etc...
 
 
 Another  question  that  i  had  was  does  adding  Na2S2O3  (  Hypo  )
 make  water  more  acidic  cause  i  see  that  the  reaction  is
 
   Na2S2O3  +  Cl2  +  H2O  â€”>  Na2S04  +  S  +  2HCl
 
 And  excessive  hypo  will  further  react  to
   Na2S2O3  +  2HCl  â€”>  2NaCl  +  H2O  +  S  +  SO2
 
 And  in  many  sites  people  prefer  Aeriating  after  adding  hypo  before  using  it  in  aquarium  to  expell  So2  gases,  Is  this  true  for  planted  tanks  also,  Or  its  just  there  in  book  and  does  not  cause  effects  to  our  tanks.
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PostPosted: Thu Aug 31, 2006 11:07 am Post subject: Re: Use of activated carbon in planted tanks Reply with quote

 What  is  the  chlorine  ppm  in  tap  water  about  0.125  -  0.3  ppm?  HCl  is  of  no  consequence.
 
 As  for  removing  the  chlorine  etc.,  you  could  pass  the  tap  water  through  a  DIY  cartridge  containing  AC  slowly  to  get  rid  of  the  stuff  while  filling  up  your  tank,  rather  than  adding  to  the  filter.
 
 Getting  rid  of  Tannins  from  driftwood,  is  your  choice.
 
 Your  whole  pmdd/macro  dosing  regime  will  go  for  a  six  each  time  you  change  AC.
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rgg
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PostPosted: Thu Aug 31, 2006 12:09 pm Post subject: Re: Use of activated carbon in planted tanks Reply with quote

                                                   
Madan  wrote  (View  Post):                

 
 As  for  removing  the  chlorine  etc.,  you  could  pass  the  tap  water  through  a  DIY  cartridge  containing  AC  slowly  to  get  rid  of  the  stuff  while  filling  up  your  tank,  rather  than  adding  to  the  filter.
                 

 
 
 This  should  be  a  good  idea.  There  by  no  extra  chemicals  (Hypo)  in  my  water.  Instead  i  am  removing  them.
 
 But  still  have  to  store  the  water  and  have  to  get  my  brittle  broken  sintex  tank  replaced  immediately  Sad  
 
 
 But  tannin's  Hmmmm...  Need  to  figure  out  different  method  now  to  de-colour  aquarium  water.
 
 
 Raghu
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