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http://indianaquariumhobbyist.com/community/ :: View topic - RODI unit Help Needed...
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RODI unit Help Needed...

 
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Tausey
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PostPosted: Mon Jan 30, 2012 3:55 am Post subject: RODI unit Help Needed... Reply with quote

 Hi  Guys,
 
 I  am  interested  in  buying  a  rodi  unit  for  my  marine  aqua  but  unble  to  get  any  info  apart  from  kent,  aquaguard   and  other  local  brands,which  i  am  not  too  keen  on  buying.  Can  someone  tell  me  where  to  get  rodi  unit  and  how  much  would  it  cost.  I  stay  in  Pune(  Maharashtra)
 
 
 
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 Tauseef
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Tausey
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PostPosted: Tue Jan 31, 2012 5:02 am Post subject: Re: RODI unit Help Needed... Reply with quote

 Team,
 
 Can  someone  help  me  in  this  as  its  really  Urgent
 
 
 Regards
 Tauseef
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yajur
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PostPosted: Tue Jan 31, 2012 9:18 am Post subject: Re: RODI unit Help Needed... Reply with quote

 In  India  Ro  unit  is  easy  to  source  but  DI  unit  is  hard  to  get.
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aquadip2000
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PostPosted: Tue Jan 31, 2012 9:46 am Post subject: Re: RODI unit Help Needed... Reply with quote

 Hi  Tauseef  ,
 
 We  have  an  RO  and  DI  Unit  suitable  for  preparing  water  for  Marine  tank  use.
 
 
 
 
 
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Tausey
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PostPosted: Thu Feb 02, 2012 4:51 am Post subject: Re: RODI unit Help Needed... Reply with quote

 Hey
 
 Is  is  fine  if  i  use  domestic  RO  unit  like  aqua  guard  and  kent  to  get  water  for  my  marine  tank??
 
 
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 Tauseef
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josyjames
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PostPosted: Thu Feb 02, 2012 11:07 am Post subject: Re: RODI unit Help Needed... Reply with quote

 Yes.  You  can.  There  is  no  issue's  in  using  the  domestic  RO  unit  for  this  purpose.  All  RO  units  functions  on  the  same  technology.  Only  the  brand  names  differ.
 
 There  are  other  parameters  that  you  need  to  think  about  when  you  are  planning  to  use  the  Aqua  Guard/Kent  etc  kind  of  system  for  the  Aquarium.
 
 Let  me  give  a  scenario:
 
 The  Aqua  guard  medium  level  model  which  comes  in  the  market,  hold  8  lts  of  purified  water  in  its  storage  container.  And  it  can  purify  xx  amount  of  water  per  hr.  Imagine  your  tank  hold  100  lts  of  water  and  if  you  plan  to  use  the  entire  water  as  RO  water,  then  you  need  to  store  the  RO  water  in  a  big  container  to  add  upto  100  lts.  At  a  time,  you  get  only  8  lts  of  RO  water.  So  you  will  have  to  keep  on  storing  the  water  to  fill  your  aquarium.
 
 Now  there  is  a  life  time  for  the  filter  candles  inside  the  RO  unit.  It  say  that  we  need  to  replace  the  candles  every  xxxx  lts  of  water  is  purified.  Typically  it  says  that  we  need  to  change  the  candles  every  year  depending  on  the  consumption  of  the  water.  And  the  candle  sets  cost  around  3.5K.  
 
 This  says  that  if  you  are  planning  to  use  the  domestic  RO  unit,  you  will  end  up  in  using  the  system  more  frequently  and  which  in  turn  will  make  you  to  change  the  candles  of  the  filter  unit  to  be  replaced  very  soon..
 
 This  is  my  perception.  Lets  experts  comment  more  on  this.
 
 
 I  would  suggest  to  get  the  units  separately  and  build  the  RO  unit.  You  can  all  the  units  separately  in  the  market.  You  get  the  micron  filter  candle,  UV  unit,  Carbon  filter  unit,  Pressure  booster  pump  separately..  All  you  need  is  to  find  them  where  to  get.  See  if  the  cost  is  lesser  than  the  domestic  unit  and  assemble  it.
 
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aquadip2000
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PostPosted: Thu Feb 02, 2012 12:44 pm Post subject: Re: RODI unit Help Needed... Reply with quote

 If  i  may  say  a  few  words  with  no  offense  to  any  product  available  in  the  market.
 
 The  process  of  RO  is  the  same  globally  ,  but  the  devices  are  made  to  suit  different  industry  needs.
 
 A  domestic  RO  unit  available  commercially  is  used  mainly  for  drinking  water  application,  the  TDS  if  measured  at  the  output  is  about  40  ppm.  This  TDS  is  required  for  all  drinking  water  ,  as  TDS  of  below  20  will  essentially  strip  the  water  of  all  salts  causing  deficiencies  in  drinking  water  suitable  for  us.
 
 If  you  have  tried  tasting  the  Water  at  TDS  of  40  and  zero  one  will  be  able  to  make  out  the  stark  difference.  There  is  no  taste  at  Zero  TDS  and  you  will  not  feel  like  drinking  it.
 
 For  marine  tanks  ,  the  salt  which  is  commercially  available  is  manufactured  to  be  mixed  at  water  which  has  a  TDS  of  zero.  If  this  water  and  good  quality  sea  salt  is  used  you  salt  dissolves  better  and  also  the  probability  of  unwanted  algae  is  much  lower.
 
 So  ideally  an  aquarium  compatible  unit  should  have  a  TDS  of  Zero  for  best  results.  Try  it  once  and  you  will  see  the  marines  doing  better!
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random2
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PostPosted: Thu Feb 02, 2012 3:33 pm Post subject: Re: RODI unit Help Needed... Reply with quote

 valuable  information  by  Shelly  and  Adip.
 
 Basically  the  filtering  system  are  speced  by  lt/hr.  This  would  be  important  as  Shelly  pointed  out.  You  need  to  get  a  RO  system  for  your  needs.  So  first  plan  on  your  current  requirements  and  if  any  additional  tanks  you  plan  to  setup  in  near  future.  
 
 And  as  Adip  pointed  out,  you  could  look  for  near  zero  TDS.  But  this  would  slightly  vary  over  time  (in  my  opinion).
 
 I  know  a  person  who  builds  RO  units  for  bottling  plants  and  hotels.  He  told  me  that  most  RO  units  have  a  feedback  from  the  filtering  stage  to  the  output  (bypassing  the  membrane)  so  that  TDS  slightly  increases  (As  Adip  mentioned).  This  wont  be  necessary  for  aquarium  use.  
 
 So  your  best  bet  is  to  -
 1.  Get  an  idea  of  how  much  water  you  need  per  week
 2.  Go  for  a  system  built  for  the  purpose  or  get  it  custom  made  according  to  requirements  (or  DIY  if  you  are  like  Shelly  Smile  ).
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Nonza
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PostPosted: Thu Feb 02, 2012 5:12 pm Post subject: Re: RODI unit Help Needed... Reply with quote

 There  are  few  more  things  to  ponder....
 
 1.  Do  you  know  what  you're  current  TDS  is?  --  Order  a  TDS  meter  online,  or  from  Hanna  India.
 
 2.  If  you  do  plan  on  using  Aqua  guard  or  kent  or  whatever,  ensure  that  there  is  no  addition  of  silver  nano  particles.  Some  of  the  units  have  the  facility,  and  you  may  nuke  your  tank  with  it.
 
 3.  A  typical  RO  unit  (at  least  the  one  that  I  use)  is  as  follows,  in  order...
 
 Tap  -->  Booster  Pump  -->  Sediment  Filter  -->  Carbon  block  -->  Pressure  Gauge  -->  RO  Membrane  -->  DI  Unit  -->  Collection  Drum
 
 This  gives  me  0ppm  TDS  from  source  water  of  87ppm
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josyjames
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PostPosted: Thu Feb 02, 2012 5:18 pm Post subject: Re: RODI unit Help Needed... Reply with quote

 @  Nonza,
 
 You  have  a  very  good  water  over  there  in  your  place...   Smile  
 
 Here  in  Bangalore,  its  very  hard  to  get  a  water  with  less  tds.  My  home  water  tds  is  670ppm+  !!!!!  There  are  places  in  Bangalore  where  the  tds  is  1000+  !!!!
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PostPosted: Thu Feb 02, 2012 5:35 pm Post subject: Re: RODI unit Help Needed... Reply with quote

 @  Shelly
 
   Very Happy  I  completely  agree.  In  fact,  I  was  pretty  shocked  with  the  levels.  I  expected  far  worse.  
 
 1000+  in  Bangalore  is  pretty  insane!
 
 I  also  tested  for  Phosphates  @  0.00  ppm,  Silicates  @  2ppm  from  my  source  water.
 
 The  important  point  to  consider,  is  that  you  may  or  may  not  need  a  RO  unit  depending  on  your  source.
 
 @Tausey
 For  reference,  I  do  run  a  softie  reef  using  pure  source  water  87ppm.  If  you  believe  that  0  TDS  REMOVES  ALL  algae  problems,  you  are  mistaken.  It  certainly  helps,  but  without  proper  filtration  and  nutrient  export,  you'll  still  have  some  algae.  Get  a  TDS  meter  first,  and  then  decide  for  yourself,  or  post  back,  and  we'll  see  how  to  proceed....
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