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http://indianaquariumhobbyist.com/community/ :: View topic - How to : Low cost DIY yeast CO2 setup
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How to : Low cost DIY yeast CO2 setup
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Mansoor
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PostPosted: Thu May 12, 2011 10:44 am Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 I  am  using  1.5  ltrs  coke  bottle  with  combination  of  100  gms  sugar  and  1/4  tsp  of  yeast.  CO2  start  generating  in  less  than  30  minutes  but  the  problem  is  that  after  36  hrs  it  reaction  stops.  After  checking  carefully  i  found  that  the  junction  of  bottle  cap  is  leaking,  i  tried  to  fix  it  up  with  cello  tape  but  no  success.  Is  there  any  other  way  to  stop  leaking  of  bottle  cap  junction,  i  also  tried  to  change  bottle  but,  again  no  success,after  36  hrs  it  again  stop  pouring  CO2.
 Your  suggestion  will  be  helpful  because  now  i  have  stopped  making  any  CO2  unless  i  get  solution  for  this  leakage  problem.
 Thanks  in  advance.
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manav1984
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PostPosted: Thu May 12, 2011 12:34 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 check  the  bottle  cap  through  which  piping  runs.  This  has  to  be  sealed  properly.  I  would  advise  you  to  use  silicone  sealant  if  you  have  any  as  this  seals  the  openings  (if  any)  properly.  Otherwise  you  can  use  any  epoxy  or  fevicol.  When  applying  any  glue/silicon/etc  make  sure  (before  it  hardens)  that  there  are  no  gaps  or  holes  present  and  that  it  has  been  evenly  applied.  To  be  on  the  safe  side  use  more  than  one  layer  of  the  sealant,  so  that  if  there  are  any  holes  or  gaps  they  are  finally  covered  up.  One  thing  to  note  is  that  DIY  co2  is  not  constant,  sometimes  you  will  find  less  co2  generation,  sometimes  more.  It  is  a  bit  erratic.Best  way  is  to  take  a  fresh  bottle,  fill  it  with  some  water,  put  the  cap  on  tight  and  overturn  it  for  10-20  secs  check  if  any  water  is  dripping.  If  no  water  is  leaking  then  this  bottle  will  do.  Cello  tape  is  no  use  dont  waste  it.  Dont  hammer  through  the  cap  to  make  a  hole,  as  the  impact  creates  cracks  in  the  cap.  Use  a  drill.  How  are  you  dispersing  the  co2  into  the  aquarium  ?
 The  yeast  that  you  are  using  -  is  it  stored  in  the  freezer?  if  stored  in  freezer,  keep  it  out  for  an  hour  so  that  it  gets  to  room  temperature  then  use  it.
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Mansoor
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PostPosted: Fri May 13, 2011 5:02 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 thanks  Manav1984  for  your  reply.
 Is  it  so  that  every  time  i  have  to  change  bottle  and  tubing  linefor  yeast  generation,
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manav1984
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PostPosted: Fri May 13, 2011 6:58 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 No.  After  using  the  bottle  for  2  weeks  or  so  when  co2  generation  stops  completely  for  about  a  day  or  so,  then  empty  bottle  and  rinse  with  hot  water  a  couple  of  times  so  it  is  clean  and  then  repeat  process  to  refill  bottle  with  yeast  sugar  content.
 You  only  need  to  use  one  bottle  throughout,  thats  why  you  have  to  make  sure  that  rubber  tubing  running  through  bottle  cap  is  airtight  and  that  the  bottle  cap  is  also  airtight  when  its  screwed  on.
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manav1984
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PostPosted: Fri May 13, 2011 7:03 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 Just  for  your  information.  I  had  prepared  my  co2  solution  (yeast  +  sugar)  3  days  back.  Only  today  morning  did  i  notice  a  somewhat  steady  supply  in  co2,  before  that  i  could  hardly  see  any  co2  being  produced.  The  co2  also  takes  time  to  build  up  pressure  in  the  bottle.  Are  you  using  any  diffuser  or  check  valve  Mansoor  ?
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cinciboy
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PostPosted: Mon Jun 06, 2011 9:35 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 New  setup:
 1.2  L  sprite  bottle
 2  tea  spoons  sugar
 10  granules  active  yeast
 
 --  has  been  working  more  than  a  week  now  Drinking   Drinking
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ShankarB
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PostPosted: Sun Jul 03, 2011 6:39 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 Looks  like  a  very  long  thread.   Scanning  through  it  I  get  different  recommendations  for  sugar/  yeast  measures,  which  is  fine.   I  have  a  doubt,  could  be  quite  silly:   Can  I  just  drop  the  tube  coming  out  of  the  CO2  bottle  into  the  tank  with  a  simple  airstone?   Will  it  work?
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ashwin1224
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PostPosted: Sun Jul 03, 2011 7:18 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

                                                   
ShankarB  wrote  (View  Post):                
Looks  like  a  very  long  thread.   Scanning  through  it  I  get  different  recommendations  for  sugar/  yeast  measures,  which  is  fine.   I  have  a  doubt,  could  be  quite  silly:   Can  I  just  drop  the  tube  coming  out  of  the  CO2  bottle  into  the  tank  with  a  simple  airstone?   Will  it  work?                

 
 It  wont  work.CO2  has  a  very  very  less  dissolution  capablity  with  water.Conventional  airstones  dont  make  bubbles  fine  enough  for  the  CO2  to  dissolve.If  you  have  a  problem  with  making  the  diffuser,you  can  just  plug  the  airline  to  the  air  intake  of  a  power  filter.
 It  works  for  me   Smile  
 
 All  The  Best   Thumb Up
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manav1984
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PostPosted: Sun Jul 03, 2011 7:25 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 Before  i  comment  on  your  query  i  would  like  to  update  you  on  my  yeast  mixtures  -  I  have  seen  my  last  2  mixtures  last  about  1  month  (as  per  my  mixture)
 Yes  it  is  quite  possible  that  it  will  work  with  just  an  airstone  attached  to  the  end  of  the  tubing  but  its  not  recommended.  Reason  being,  the  co2  does  not  generate  enough  pressure  on  its  own,  that  is  why  its  pressure  is  supplemented  by  a  filter  intake.  With  only  an  airstone,  the  co2  will  solely  rely  on  its  own  pressure  and  the  rate  it  is  being  generated  at.  So  at  times  when  there  is  less  co2  pressure  there  might  be  lesser  co2  released  into  the  aquarium.  You  can  probably  counter  this  by  increasing  the  amount  of  yeast  to  the  mixture,  but  its  life  will  be  shortened.  You  can  experiment  to  see  what  works.
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ShankarB
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PostPosted: Mon Jul 04, 2011 3:23 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 I  use  the  simplest  form  of  filter  -  a  typical  submersible  sponge-based  filter,  like  the  one  shown  here:  http://www.ebay.co.uk/itm/Aquarium-Submersible-Sponge-Filter-200L-h-Fish-Tank-/150623208948?pt=UK_Pet_Supplies_Fish&hash=item2311d7c5f4&clk_rvr_id=245584658252&x=51&y=2
 
 So,  do  I  attach  the  CO2  inlet  to  this  one?   And  provide  separate  aeration?   I  thought  the  free  air  inlet  in  the  filter  is  to  provide  more  aeration  (oxygen)  to  the  tank.   So  if  I  change  it  to  CO2,  I'm  assuming  that  I  need  to  do  something  extra  for  getting  normal  air.
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manav1984
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PostPosted: Mon Jul 04, 2011 4:17 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 Hi  Shankar,
 
 For  a  normal  water  filter  like  this,  just  attach  the  other  end  of  the  tubing  which  is  connected  with  your  co2  bottle  to  the  air  intake  nozzle  of  the  filter.  The  air  intake  is  made  to  provide  oxygen  to  the  tank  when  an  open  ended  rubber  tubing  is  attached(with  one  end  out  of  the  water),  but  since  you  want  to  attach  it  to  the  diy  co2  setup,  it  will  release  co2  instead  of  oxygen.  If  you  are  running  a  planted  aquarium,  theres  no  need  to  pump  in  any  extra  oxygen  into  the  water.  Just  make  sure  you  do  weekly  water  changes.
 What  are  your  tank  specifications  including  lighting  ?  How  many  plants  and  fish  have  you  got  ?
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ShankarB
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PostPosted: Mon Jul 04, 2011 4:51 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 Manav,
 
 That  seems  doable,  or  I  can  think  about  adding  a  2  way  connector  to  get  both  air  and  CO2  come  together  through  the  filter.
 
 My  tank  is  currently  in  a  quarantine  mode  :-)  (suspected  widespread  ich  spread,  which  luckily  seems  to  have  gone  away).
 
 Its  a  120-liter  tank.  The  plants  are  mostly  common,  fast  to  grow  varieties.   The  tank  is  placed  near  an  east-facing  window,  so  gets  nice,  but  not  bright,  sunlight  from  early  morning  till  noon.   I  had  about  25+  young  fishes  in  the  tank.   I  plan  to  stock  it  as  much  in  future.
 
 In  the  new  setup,  I  want  to  include  more  carpet  plants  in  the  foreground  -  Blyxa,  christimas  moss  and  the  like  and  use  tall  grasses  like  Eleocharis  vivipara  in  the  background.   So  am  thinking  that  these  plants  might  need  added  CO2.
 
 I'm  also  thinking  if  I  should  try  setting  up  a  Walstad  type  of  a  tank  that's  supposed  to  be  self-sustainable  without  any  additional  help.   Any  experience/expert  advice  there  would  also  help.
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PostPosted: Mon Jul 04, 2011 5:10 pm Post subject: Re: How to : Low cost DIY yeast CO2 setup Reply with quote

 You  should  not  add  additional  oxygen,  the  plants  and  fish  will  automatically  create  a  balance.  Oxygen  is  anyways  plentiful  -  esp  after  water  changes.  The  way  I  see  it  you  will  have  to  work  on  your  lighting,  but  do  take  a  second  opinion.
 When  you  add  more  fish  make  sure  they  are  not  over  stocked,  better  to  be  understocked  and  compatible  with  your  plants  -  all  the  best.
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