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http://indianaquariumhobbyist.com/community/ :: View topic - Large External CO2 Reactor
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Large External CO2 Reactor
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ravi
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PostPosted: Mon Jul 07, 2008 3:24 pm Post subject: Re: Large External CO2 Reactor Reply with quote

 Hi  Deepak,
 
 [quote="Aquadeep";p="98595"]
                                                 
ravi  wrote  (View  Post):                
That  should  be  
 
 Tank  ->  Eheim  filter  ->  external  reactor  ->tank                

 
 Hmmmm  !  I  don't  want  additional  load  on  the  filter  delivery  side.
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Deepak_Brid
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PostPosted: Mon Jul 07, 2008 3:39 pm Post subject: Re: Large External CO2 Reactor Reply with quote

                                                   
Aquadeep  wrote  (View  Post):                

 
 For  efficiency  you  need  to  drive  it  by  something  more  than  1000lph  power  head  or  pump  &  increase  proportionally  based  on  the  aquarium  size  &  CO2  bubble  count.  [/color]                

 
 
 Eheim  Compact+  2000  is  the  smallest  in  its  category.  These  variable  output  pump  (VOP)  gives  us  the  freedom  to  vary  the  flow  based  on  the  CO2  requirement.
 
 Madan  is  currently  using  them  on  small  aquariums  &  later  planning  to  move  these  reactors  on  larger  ones.  Therefore  a  VOP  gives  more  flexibility  &  protects  investment,  catering  future  expansion.
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Deepak_Brid
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PostPosted: Mon Jul 07, 2008 3:49 pm Post subject: Re: Large External CO2 Reactor Reply with quote

                                                   
ravi  wrote  (View  Post):                
Hmmmm  !  I  don't  want  additional  load  on  the  filter  delivery  side.                

 
 Well,  the  only  problem  I  see  here  is  the  Eheim  head  developing  an  air  lock,  which  is  if  the  finer  CO2  bubbles  escape  from  the  reactor.  Well,  the  later  also  indicates  the  pump  is  not  properly  tuned  to  the  reactor,  along  with  high  bubble  count,  pump  output,  media  (restrictive),  etc.
 
 The  Airlock  can  be  avoided  by  using  a  Solenoid  valve,  but  the  following  issue  still  persists  -  In  this  scenario  the  reactor  will  also  act  as  a  pre-filter  choking  up  frequently,  a  very  unpleasant  scene  along  with  loss  in  it's  CO2  dissolving  efficiency.  
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Madan
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PostPosted: Mon Jul 07, 2008 4:07 pm Post subject: Re: Large External CO2 Reactor Reply with quote

 There  will  be  no  appreciable  load  on  filter  delivery  side  Ravi,  the  reason  I  have  changed  over  from  Tank  --->  Eheim  Filter  -->  Reactor  -->  tank,  is  that  in  my  absence  due  to  filter  clogging,  the  earlier  dymax  reactor  to  Eheim  flow  was  mismatched  and  this  was  leading  to  CO2  bubbles  escaping  into  the  tank  and  very  little  efficiency.
 
 This  was  leading  to  algae.
 
 Previously  when  I  was  using  a  dedicated  pump  for  an  internal  glass  Reactor  I  never  faced  any  problems,  except  when  snails  used  to  clog  the  internal  power  head  driving  the  reactor.  This  was  a  nuisance  in  my  absence  as  it  required  cleaning  the  intake  grid  daily.
 
 To  avoid  the  clogging  of  internal  powerhead,  I  went  the  external  reactor  route,  then  over  2  odd  years  I  have  observed  this  problem  using  a  canister  filter  to  drive  the  reactor.
 
 There  was  no  quality  Variable  output  pumps  available  in  the  market.  These  Eheim  compact+  pumps  are  a  new  development  in  the  last  year  or  so.
 
 In  one  of  my  external  reactors  being  driven  by  a  Eheim  2028  I  have  no  trouble  as  2028  seems  to  cope  well  even  when  not  cleaned  for  a  year,  2215  and  2217  have  not  given  me  peace.
 
 The  original  internal  reactor  made  of  glass  I  had  designed  did  very  well  with  an  internal  600  liters  power  head,  as  every  thing  was  well  matched  at  the  design  stage  itself,  but  the  snails  ruined  the  show  by  clogging  the  intake  of  the  internal  pump.  Then  the  same  reactor  was  driven  by  an  Eheim  2217,  which  again  did  very  well  for  a  few  years,  but  the  glass  reactor  broke  when  I  was  away,  same  was  not  noticed  for  a  few  months  and  the  usual  disaster.
 
 Finally  for  large  planted  tanks  you  need  good  water  circulation,  and  very  little  filtration(  1  no.  2217  would  do).  So  a  Eheim  Compact  pump  is  an  option  for  circulation.
 
 I  hooked  up  the  new  reactor  +  Eheim  compact  2000  pump  at  3:00  PM  on  6th  July,  bubble  rate  was  about  1.5  bubbles  per  second.  next  morning  (7th  July)  all  fish  were  dead  except  a  corydora.  With  the  dymax  recator  +  2215  I  could  increase  to  3  bubbles  per  second  and  fish  would  be  fine,  AND  have  less  CO2  in  the  tank.
 
 Yesterday  evening  after  reducing  the  bubbles  to  1  per  second,  my  tank  pH  was  about  5.8,  I  have  reduced  the  bubble  rate  a  bit  more  after  seeing  such  a  low  pH.
 
 If  you  do  clean  your  Eheim  canister  say  every  2  months  or  so,  then  you  will  not  have  to  setup  a  dedicated  external  pump  for  the  reactor  for  smaller  tanks,  it  will  do  well  with  the  dymax  reactor.
 
 Going  the  other  way  Tank  --->  Reactor  --->  Filter  --->  Tank,  there  is  a  danger  of  CO2  being  sucked  into  the  canister  and  stopping  all  flow  due  to  a  gas  lock  in  the  canister.  The  water  flow  should  be  from  top  to  bottom  in  the  reactor  and  CO2  bottom  to  top  for  best  results.
 
 With  the  above  system  very  soon  CO2  will  escape  into  your  tank  from  the  top  readily  and  break  the  siphon  depending  on  how  the  inlet  piping  is  placed.  Some  CO2  will  collect  in  the  canister  due  to  the  suction  of  the  canister  and  stop  flow  and/or  you  will  have  burping  of  large  gas  bubbles  by  the  canister,  all  said  not  very  efficient.
 
 Too  many  things  can  go  wrong  with  Tank  --->  Reactor  --->  Filter  --->  Tank  system  and  some  of  them  or  all  together  will  go  wrong  at  the  same  time.  Murphy's  Law.
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kbharanikumar
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PostPosted: Mon Jul 07, 2008 10:12 pm Post subject: Re: Large External CO2 Reactor Reply with quote

 Hi  All
 
 I  am  using  Jaqno  external  co2  rector  for  more  6  months,  
 
 
 Bharani
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Hamza
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PostPosted: Mon Jul 07, 2008 10:22 pm Post subject: Re: Large External CO2 Reactor Reply with quote

 @Mr.Bharani  ...Is  that  clamp  for  holding  the  lid  of  eheim?  If  so....why?
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Prem kk
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PostPosted: Tue Jul 08, 2008 9:26 am Post subject: Re: Large External CO2 Reactor Reply with quote

 Hi  Madan,
 
 Your  post  has  brought  more  clarity  on  the  topic.   I  have  placed  the  order  for  Eheim  compact  +  3000  considering  I  have  a  6  foot  tank.  Hopefully  I  should  have  this  operational  by  this  weekend  and  shall  post  some  pictures  to  get  your  inputs.
 
 Regards,
 Prem
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harshal
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PostPosted: Tue Jul 08, 2008 12:10 pm Post subject: Re: Large External CO2 Reactor Reply with quote

 Hi  Madan
 
    I  have  a  question....you  think  the  height  of  the  reactor  will  make  a  difference  in  the  efficiency  of  the  reactor?  The  reason  I  am  asking  this  is  because  I  am  trying  to  decide  between  the  Aquamedic  external  reactor  and  this  one.  The  aquamedic  reactor  is  10.5"(height)  X  3.5"(dia)  [Reaction  Chamber  dimensions]  Vol  is  1.5  lts.
    Also  what  role  you  think  the  vol  of  the  reactor  will  play  in  its  efficiency.  I  am  trying  to  compare  the  two  reactors  to  see  what  would  be  a  better  option  for  a  80  gal  tank.
 
 Thanks.
 
 Regards
   Harshal
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Madan
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PostPosted: Wed Jul 09, 2008 10:10 am Post subject: Re: Large External CO2 Reactor Reply with quote

 Larger  the  volume  higher  flow  needed.
 
 Larger  the  diameter  higher  flow  needed.
 
 Larger  the  height  vs  diameter,  most  efficient  setup,  contact  time  is  longest  and  you  could  get  by  with  a  less  flow.  But  you  need  to  create  turbulence.  This  doesn't  mean  a  thin  long  reactor  will  do  the  best.  Nada.
 
 I  haven't  worked  out  the  optimum  height  vs  diameter  relationship.  Not  in  a  mood  for  design.
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Prem kk
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PostPosted: Sat Jul 12, 2008 6:59 pm Post subject: Re: Large External CO2 Reactor Reply with quote

 Hi  Madan,
 
 Received  the  Eheim  compact  +3000  pump,  the  t-connector  and  the  bulk  head  fitting.  
 
 I  am  just  waiting  for  the  drilling  machine  to  reach  home.  I  shall  post  pictures  hopefully  by  tomorrow  of  the  completed  set  up.
 
 Regards,
 Prem
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Prem kk
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PostPosted: Sun Jul 13, 2008 10:41 pm Post subject: Re: Large External CO2 Reactor Reply with quote

 Madan,
 
 Finally  I  managed  to  put  the  whole  thing  together.  Thanks  for  your  post  was  really  helpful.
 
 The  Eheim  compact+  3000  pump
 
 
 Bulk  Head  Fitting
 
 
 Hole  Drilled
 
 
 Bulk  Head  fitting  fixed  with  the  cover
 
 
 Reverse  View
 
 
 Co2  tubing  fixed
 
 
 Full  Unit  Operational
 
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vasvijay
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PostPosted: Mon Jul 14, 2008 8:26 am Post subject: Re: Large External CO2 Reactor Reply with quote

 Dear  Camy,Nice  work.Can  you  please  post  the  pictures  of  the  inlet  and  outlet  pipe  fixed  in  u  r  tank.Are  you  using  eheim  U  tubes  and  the  spray  for  for  the  outlet.and  also  the  pictures  of  your  tank,
 
 regards  
 
 vijayan
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Prem kk
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PostPosted: Mon Jul 14, 2008 8:47 am Post subject: Re: Large External CO2 Reactor Reply with quote

 Hi  Vijayan,
 
 Thank  you.  I  used  the  Eheim  2217  suction  U-tube  for  sucking  water  from  the  tank,  the  output  is  a  normal  tube  running  inside  the  tank.  The  T-connector  i  got  was  a  little  big  so  could  not  split  the  output  to  two  ends.  I'll  work  on  that  next  week.  
 
 Below  is  the  picture  of  my  tank.
 
 
 
 Regards,
 Prem
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nytyn
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PostPosted: Mon Jul 14, 2008 12:49 pm Post subject: Re: Large External CO2 Reactor Reply with quote

 And  you  keep  guppies  in  that  tank?
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Prem kk
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PostPosted: Tue Jul 15, 2008 8:59 am Post subject: Re: Large External CO2 Reactor Reply with quote

 Dude,
 
 The  photo  above  was  when  my  tank  was  cycling,  few  weeks  back.
 
 Now  it  has  60  cardinals  in  them  which  I  got  from  you.  Real  good  ones  mate.  
 
 Cheers,
 Prem
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