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http://indianaquariumhobbyist.com/community/ :: View topic - CO2 Setup Issue
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CO2 Setup Issue

 
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kailasjo
IAH New Member
IAH New Member



Joined: Apr 08, 2019
Posts: 4


Status: Offline
PostPosted: Mon Aug 12, 2019 3:30 pm Post subject: CO2 Setup Issue Reply with quote

 Hi
 
 I  have  newly  setup  pressurised  CO2  system  with  these  equipments-
 1)  2KG  Cylinder  (bought  from  LFS,  it's  made  up  from  fire-extinguisher  cylinder)
 2)  Mufan  dual-gauge  regulator  with  built-in  solenoid
 3)  ISTA  3-in-1  Ceramic  Diffuser
 The  diffuser  looks  good  as  I  am  using  it  for  past  2  months  with  DIY  and  another  pressurised  setup.  I  also  periodically  clean  it  with  bleach.
 I  get  nice  CO2  mist  through  the  diffuser  at  the  rate  of  1  bubble  per  2  seconds.
 
 However,  whenever  I  shut  down  the  solenoid,  within  couple  of  hours  my  CO2  pipe  gets  flattened  like  the  air  has  been  sucked  out  of  it.  Because  of  this,  it  takes  lot  of  time  (an  hour  or  more)  for  CO2  to  start  from  diffuser  when  I  switch  on  the  solenoid.  Basically  it  has  to  inflate  the  pipe  back.  If  I  remove  the  pipe,  it  get  inflated  quickly  and  everything  starts  working  after  fitting  it  back.
 [Trying  to  attach  pics  to  give  better  idea  of  the  setup  and  issue.]
 
 
 I  suspected  some  back-pressure  from  the  diffuser  or  regulator  and  hence  tried  putting  ISTA  check  value  just  before  the  diffuser.  But  it  did  not  make  any  change.
 
 Kindly  help  on  fixing  this.  Thanks  in  advance.
 
 Regards,
 Kailas
 
 [img]https://imgur.com/vOMGgXF[/img]
 
 [img]https://imgur.com/KfJKHHI[/img]
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nskumar
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Frequent Visitor to IAH



Joined: Jan 13, 2012
Posts: 123
Location: Chennai

Status: Offline
PostPosted: Tue Aug 13, 2019 6:20 pm Post subject: Re: CO2 Setup Issue Reply with quote

 Hi,  
 
 Put  a  NRV  three  inches  above  diffuser.  
 
 This  will  fix  your  issue.
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kailasjo
IAH New Member
IAH New Member



Joined: Apr 08, 2019
Posts: 4


Status: Offline
PostPosted: Tue Aug 13, 2019 10:31 pm Post subject: Re: CO2 Setup Issue Reply with quote

 Thanks  nskumar  for  the  response.  I  will  definitely  try  this  out.
 
 Could  you  please  shed  some  light  on  these  points  -
 1)  What  is  the  root  cause  for  this  behaviour?
 2)  Why  the  built-in  NRV  in  my  diffuser  or  even  the  other  NRV  installation  (which  was  around  1-2  inches  above  diffuser)  did  not  solve  the  issue?  Any  specific  reason  it  should  be  3+  inches  above  the  diffuser?
 
 Thanks  &  Regards,
 Kailas
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