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http://indianaquariumhobbyist.com/community/ :: View topic - Glutaraldehyde as a Co2 source?
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Glutaraldehyde as a Co2 source?
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gopiqpp
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PostPosted: Fri Mar 24, 2006 12:12 pm Post subject:  Reply with quote

 http://www.infectioncontroltoday.com/pdf/UC-20901.pdf
 
 Arup,  this  page  from  Union  Carbide  gives  the  basic  chemistry  of  Gluteraldehyde.  According  to  them  an  aqueous  solution  does  not  require  stabilzers.  As  a  disinfectant  it  becomes  progressively  less  effective  as  it  continuously  interacts  with  bacterial  cell  walls.Its  biocidal  activity  becomes  progressively  weaker  and  is  neutralized  in  7-14  days.  But  this  does  not  alter  its  chemical  structure;  So,  if  it  is  not  required  for  sterilization  and  is  not  subjected  to  very  alkaline  pH  it  should  retain  its  basic  chemical  properties  as  a  nutrient  for  plants  indefinitely.  What  say  you  ?  Confused
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Madan
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PostPosted: Fri Mar 24, 2006 6:44 pm Post subject:  Reply with quote

 Thanks  Gopi  for  the  info.  It  was  actually  me  speculating  on  the  stability.
 
 Arup  the  Flourish  Excel  that  I  have  sent  you  today  has  the  following  recommended  dosage:
 
 Initial  use  or  after  >  40%  water  change  -  5ml  per  40  L.
 thereafter  5ml  per  200  L  -  Daily  or  every  other  day.
 Dosing  may  be  steadily  increased  for  high  growth  aquariums.
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arupch
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PostPosted: Fri Mar 24, 2006 7:55 pm Post subject: Re: Glutaraldehyde as a Co2 source? Reply with quote

                                                   
arupch  wrote:                
Hi,
 I've  read  that  Seachem  Excel  uses  Glutaraldehyde  as  a  CO2  source.  Glutaraldehyde  is  metabolised  by  microbes  and  under  aerobic  condition  produces  CO2  as  end  product.  In  addition  to  source  of  carbon  glutaraldehyde  is  also  an  algaecide  and  also  acts  upon  microbes.
 
 The  following  links  may  be  useful  :
 http://www.infectioncontroltoday.com/pdf/UC-20901.pdf
 http://www.glerl.noaa.gov/pubs/fulltext/2005/20050003.pdf
 
 Can  anybody  throw  more  light  on  this?  And  what  is  the  concentration  of  glutaraldehyde  in  Seachem  Excel?  
 
 Any  input?                

 
 @gopi  the  links  were  part  of  my  first  post  Smile
 Any  aldehyde  soln  are  fairly  stable.  also  over  a  time  of  7-14  days  the  glutaraldehyde    is  metabolised  by  aerobic  /  anaerobic  bacteria  to  co2  or  other  compd  like  pentanedial.  glutaraldehyde  is  structurally  related  to  some  intermediates  in  the  photosynthesis  process.  so  the  plants  use  it  readily  as  a  carbon  source.  so  the  amount  dosed  in  a  day  is  probably  such  that  it  it  is  consumed  by  the  plants  within  a  day  or  so.  
 also  any  aldehyde  can  be  readily  deactivated  by  just  adding  sodium  bisulphite  to  it.  this  makes  it  harmless  and  it  is  the  recommended  procedure  for  releasing  aldehydes  in  effluent.
 
 @madan
 thanks.  i'll  try  my  best  to  crack  the  code.
 
 also  go  through  this  link  where  somebody  has  posted  that  his  friend  is  using  glutaraldehyde  in  his  planted  community  tank  -  and  the  result  is  good  without  any  adverse  effect.
 http://tropicalresources.net/phpBB2/viewtopic.php?t=11482&sid=a8661b62da1591686f4ddfeb830f2e84
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arupch
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PostPosted: Thu Mar 30, 2006 8:04 pm Post subject:  Reply with quote

 @Madan,
 got  the  sample  of  flourish  excel  today.  will  post  the  result  within  a  week.
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PostPosted: Thu Mar 30, 2006 8:52 pm Post subject:  Reply with quote

 Arup,  Ordinary  post  is  quicker  than  speed  post  to  Kolkatta.  One  letter  I  sent  by  speed  post  took  4  days  to  reach.  Thumb Down  
 In  case  you  need  more  let  me  know.  I  couldn't  find  a  larger  container  readily  that's  why  I  sent  just  that  20  -  25  ml  as  you  asked.
 
 Everyone  is  eagerly  awaiting  the  results.....  It  expands  possibilities.
 
 I  was  discussing  this  with  some  friends  in  Singapore.....  they  were  not  Liquid  CO2  fans,  but  the  advantage/uses  I  have  in  mind  for  example....  growing  some  rare,  expensive  plants,  of  which  we  can  just  about  afford  a  stalk  or  2,  in  a  nano  species  setup  to  increase  the  numbers  available  for  transfer  to  the  main  planted  tank  is  one  of  the  advantages,  that  got  their  attention.
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PostPosted: Wed Apr 12, 2006 9:09 pm Post subject:  Reply with quote

 Well  guys  result  at  last.  Thumbs Up  
 
 Flourish  Excel  contains  1.5%  Glutaraldehyde.  It  may  also  contain  other  ingredients  but  thats  too  complex  to  analyse  -  needs  mass  spectrometer  and  HPLC  which  are  out  of  reach  of  mine  at  present.
 
 I'm  thinking  of  starting  a  small  tank  (2/3  gallon)  with  some  livebearers  and  plants  as  experimental  setup.
 
 What  all  you  think?


Last edited by arupch on Wed Apr 12, 2006 11:25 pm; edited 1 time in total
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Madan
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PostPosted: Wed Apr 12, 2006 9:38 pm Post subject:  Reply with quote

 Thank  You  Arup,  Thank  You.
 
 I  am  getting  going  with  Glutraldehyde.
 
 I'll  keep  you  updated.
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PostPosted: Wed Apr 12, 2006 11:24 pm Post subject:  Reply with quote

 well  lets  start  the  experiment.  going  to  buy  glutaraldehyde  tomorrow.
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Madan
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PostPosted: Mon Apr 17, 2006 2:45 pm Post subject:  Reply with quote

 Here's  an  extract  from  the  MSDS  of  Flourish  Excel  from  Seachem.
 
   /ParaGuard,  HealthGuard  ,  Pond  HealthGuard,  *Flourish  Excel*,
       StressGuard  [NFPA  1,0,1]:
       *Principal  ingredient  is  glutaraldehyde  *with  ameliorating
       ingredients,  pH  7.  ParaGuard  also  contains  malachite  green.
       Malachite  green  is  a
       possible  carcinogen.  Ingestion  may  cause  severe  gastric  disturbance.
       May  cause  moderate  irritation  of  mouth.  If  ingested,  drink  large
       quantities  of  milk  or  water.  Universal  antidote  (charcoal)  is
       useful.  If  enough  is  swallowed  to  cause  distress,  seek  medical
       attention.  Eye
       contact  will  cause  severe  irritation.  Flush  eyes  copiously  with
       water.  Seek  medical  attention./
 
 
 http://www.seachem.com/support/MSDS.pdf
 
 One  more  bit  to  the  picture.
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Atanu
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PostPosted: Thu May 11, 2006 2:31 pm Post subject:  Reply with quote

 Arup,
 Any  noticeable  improvement  in  adding  the  magic  product  ??  
 
 Regards
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arupch
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PostPosted: Thu May 11, 2006 5:41 pm Post subject:  Reply with quote

 Sorry  mate,  haven't  started  the  tank  yet.
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PostPosted: Wed May 17, 2006 9:09 pm Post subject:  Reply with quote

 UPDATE
 
 started  adding  1.5%  Glutaraldehyde  (diluted  30ml  of  25%  Glutaraldehyde  to  500  ml)  to  a  15G  tank  @  5ml/15G.  This  dose  is  slightly  lower  than  the  Seachem  recommended  dose  (5ml  Excel  /  40Ltr  water).
 
 Adding  for  2  days  .
 
 No  adverse  effects  on  the  inhabitants.  They  are  happy  and  active  as  before.  Eating  well.
 
 No  effect  yet  on  plants  (not  supposed  to  be).  However,  the  tank  had  a  bit  of  algae  which  seems  to  be  lessened  a  bit.
 
 will  keep  you  updated  on  regular  basis.
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PostPosted: Mon May 22, 2006 9:23 pm Post subject:  Reply with quote

 DAY  8
 
 tank  is  doing  well.  no  problem  so  far  .  fishes  are  happy  too.  a  few  plants  started  producing  new  shoots.  apart  from  Glutaraldehyde  in  the  morning  i'm  also  adding  daily  PMDD  containing  Pot.  Nitrate/  Pot.  Sulphate/  Sod  Di  Hydrogen  phosphate.  at  night  i'm  adding  Microsol  B.  no  algae  breakout  so  far.  light  is  about  2.5W/G.
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PostPosted: Tue May 23, 2006 9:53 am Post subject:  Reply with quote

 Had  a  talk  with  Arup  today,  Will  take  some  Glutaraldehyde  from  him  and  try  on  my  15  gallon  tank.
 
 If  this  thing  works  then    Cheering  .
 
 
 
 regards
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PostPosted: Tue May 23, 2006 2:48 pm Post subject:  Reply with quote

 I  have  been  using  it  in  small  tanks  with  Moss  and  fry.  No  mishaps.
 
 Important  thing  is  earlier  these  little  tanks  used  to  end  up  with  a  coating  of  brown  algae  on  the  glass  in  about  a  week's  time.  This  is  not  happenning  now.  Moss  and  Java  ferns  are  not  dying.  So  it  must  help.
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