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http://indianaquariumhobbyist.com/community/ :: View topic - TDS
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TDS

 
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Gattu
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PostPosted: Sun Sep 16, 2007 1:23 am Post subject: TDS Reply with quote

 Hi,
 
 The  TDS  for  my  fresh  water  aquariums  is  around  2400  and  for  the  tap  water  is  around  2000.  I  have  installed  RO  filter  for  drinking  water;  but  was  wondering  what  should  I  do  for  my  aquariums  as  they  contains  around  300  liters  of  water.
 
 Please  suggest:
 

     
  • Do  I  have  to  worry  about  TDS?
     
  • Do  I  have  to  install  some  water  softing  device?
     
  • Please  suggest  these  devices.
     
  • How  much  will  a  electronic  TDS/PH  checking  pen  cost?
     
  • Should  I  mix  RO  water  to  the  tanks?
     

 Thanks
 
 Vikas  Sehgal
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SunnyPaaji
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PostPosted: Sun Sep 16, 2007 2:12 am Post subject: Re: TDS Reply with quote

 O  gosh  !   Shocked  2400   Cheer Up  
 
 All  you  need  is  any  Ultra-Violet  Sterilization  System.  I'm  afraid  I  can't  suggest  specific  pH  and  hardness  values  for  your  tank  without  knowing  your  fishes  and  tank  dimensions.  
 
 Here  you  go:   Thumbs Up  
   
 
 Water  Hardness
 
 Hardness  is  commonly  confused  with  alkalinity.  Calcium  and  magnesium  ions  are  the  most  common  factor  that  comprises  hardness  and  aquarium  test  kits  usually  determine  both  ions  as  "total  hardness".  Despite  the  much  confused  state  of  misinformation  prevalent  in  the  hobby,  permanent  or  general  hardness  is  true  hardness;  carbonate  hardness  (dKH)  is  not  hardness  at  all  but  alkalinity.  
 
 The  presence  of  calcium  in  aquarium  water  helps  reduce  the  loss  of  other  salts;  for  example,  sodium  and  potassium  from  the  fish's  blood.
 
 Sodium  and  potassium  are  also  important  salts  in  fish  blood  and  are  critical  for  normal  heart,  nerve,  and  muscle  function.  A  recommended  range  for  free  calcium  in  culture  waters  is  25  to  100  mg/L  (50  to  250  mg/L  CaCO3  hardness).  
 
 Water  hardness  is  expressed  in  a  confusing  array  of  scales,  although  in  the  aquarium  hobby  the  influence  is  to  express  them  in  terms  of  milligrams  per  litre  of  Calcium  carbonate  (mg/L  CaCO3),  which  is  also  equivalent  to  parts  per  million,  and  degrees  German  Hardness  (dH).  For  aquarium  purposes,  you  can  use  the  following  conversion  factors:
 
 dH  Ã—  17.9  =  ppm
 ppm  Ã—  0.056  =  dH
 
 Dissolved  Solids
 
 Total  dissolved  solids  (TDS)  is  a  measurement  of  the  total  amount  of  dissolved  substances  in  water  and  expressed  in  ppm  of  NaCl.  TDS  is  essentially  the  same  as  conductivity.  For  aquarium  applications  it  is  recommended  that  the  conversion  formula  TDS  (in  ppm)  Ã—  0.64  =  EC  (in  ÂµS/cm)  be  used.  The  conversion  formula  is  only  an  approximation.  TDS  meters  are  calibrated  with  a  Sodium  chloride  solution  and  will  cost  you  around  Rs.850.  Thumb Up  
 
 Alkalinity  and  hardness  can  be  measured  less  frequently,  perhaps  once  a  week,  as  they  do  not  fluctuate  as  rapidly
 
 Carbon  dioxide  should  be  monitored  closely  and  the  means  to  correct  problems  should  be  readily  available.  It  is  preferable  to  monitor  dissolved  oxygen  early  in  the  morning,  when  conditions  stressful  to  fish  are  most  likely  to  occur.  Conversely,  temperature  and  pH  in  ponds  are  best  measured  during  the  late  afternoon.  Chlorine  or  Chloramine  levels  in  tap  water  should  be  determined  so  that  corrective  measures  can  be  initiated.
 
 
 And  yes  you  can  add  your  RO  also  but  before  doing  that  dont  forget  about  water  capacity  and  life  of  RO.
 
 Best  way  is  to  choose  any  ulta  filteration  system.
 
 Regards
 Sunny  Rathore  Thumb Up
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deepesh
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PostPosted: Sun Sep 16, 2007 5:47 am Post subject: Re: TDS Reply with quote

 Provide  link  not  content  unless  with  specific  permission.  Or  if  the  content  is  released  to  the  public.
 
 deepesh
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rahulk
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PostPosted: Sun Sep 16, 2007 10:26 am Post subject: Re: TDS Reply with quote

 @sunny,
 How  will  Ultra-violet  Sterilization  help  TDS  ?
 
 
 Rahul
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Reddevil
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PostPosted: Sun Sep 16, 2007 8:14 pm Post subject: Re: TDS Reply with quote

 This  is  a  useful  link.  Smile
 http://members.optushome.com.au/chelmon/Hardness.htm
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Gattu
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PostPosted: Mon Sep 17, 2007 1:47 am Post subject: Re: TDS Reply with quote

 Friends...Thanks  a  lot  for  your  replies,  but  I  am  still  not  sure  if  high  TDS  is  somthing  to  worry  or  not.  
 It's  very  difficult  to  add  RO  water  to  the  tank;  as  the  capacity  for  home  RO  systems  is  very  limited  and  for  a  200+  liter  tank  will  takes  too  much  time.
 
 Please  share  some  ideas  on  how  to  bring  it  down.  
 
 Thanks,
 Vikas
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beta
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PostPosted: Mon Sep 17, 2007 8:32 am Post subject: Re: TDS Reply with quote

 1.  what  livestock  do  you  keep?
 2.  How  did  you  chek  your  TDS?  it  seems  abnormally  high!
 3.  RO  water  is  almost  never  used  on  its  own  and  usually  mixed  with  tap  water  to  increasing  PH  buffering  capacity.
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psimhan
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PostPosted: Mon Sep 17, 2007 9:08 am Post subject: Re: TDS Reply with quote

                                                   
beta  wrote  (View  Post):                

 2.  How  did  you  check  your  TDS?  it  seems  abnormally  high!
                 

 My  thoughts  too.  
 How  did  you  check  your  TDS  and  how  do  you  know  your  test  kits  are  good?
 
 Check  your  kits  with  distilled  water  and  see  if  it  shows  zero.
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Gattu
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PostPosted: Mon Sep 17, 2007 2:15 pm Post subject: Re: TDS Reply with quote

 this  is  a  4x1'6"x1'6"  tank  &  I  am  having  Chiclids  in  it.  I  got  the  TDS  checked  from  the  Zero  B  vendor-they  use  a  small  pen  shaped  TDS  meter  to  check  the  water.  If  I  am  checking  the  water  from  RO  it's  having  a  TDS  of  around  250.
 
 I  checked  on  net  &  found  that  TDS  as  well  as  PH  meters  are  avaliable  and  I  think  in  long  run  will  be  economical  compared  to  test  kits.  Please  tell  me  your  views  on  these.
 
 Thanks
 Vikas
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Gattu
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PostPosted: Mon Sep 17, 2007 2:44 pm Post subject: Re: TDS Reply with quote

 Some  of  the  sites  for  these  are:
 
 http://www.tdsmeter.com/products/tds4tm.html
 http://www.tdsmeter.com/products/ph200.html
 
 
 I  don't  remember  the  link  but  saw  one  which  had  TDS/PH/nitrates  &  lot  more  in  a  single  handheld  device.
 
 -Vikas
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beta
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PostPosted: Mon Sep 17, 2007 4:27 pm Post subject: Re: TDS Reply with quote

 For  most  Cichlids  you  wont  need  to  alter  the  water  chemistry  unless  you  are  trying  to  breed  some  softwater  fishes  especially  the  wild  caught  ones.
 These  pens  need  to  be  calibrated  correctly  to  get  a  fairly  accurate  reading.  I  wouldn't  advise  you  to  invest  in  a  TDS  meter  at  this  point.
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vyastk
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PostPosted: Mon Sep 17, 2007 5:44 pm Post subject: Re: TDS Reply with quote

 I  have  one  of  these  pens  with  me...Need  to  get  it  calibrated  though...Any  Idea  who  calibrates  them  in  blore?
 
 Vyas  T  K
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hayath_dyno
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PostPosted: Mon Sep 17, 2007 5:58 pm Post subject: Re: TDS Reply with quote

 Hi  Vays,
    you  could  do  it  yourself  by  testing  it  with  distilled  water.
 
 Ideally  should  be  "Zero",  whatever  non-zero  reading  you  get  it  what  you  need  to  deduct  from  your  TDS  results  to  get  the  actual  value  Smile
 
 Hope  this  helps.
 
 Cheers,
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PostPosted: Mon Sep 17, 2007 7:56 pm Post subject: Re: TDS Reply with quote

                                                   
rahulk  wrote  (View  Post):                
@sunny,
 How  will  Ultra-violet  Sterilization  help  TDS  ?
 Rahul                

 Like  Rahul,  this  is  my  question  also.  UV  only  removes  unwanted  free  floating  microscopic  water  borne  bacteria,  parasitic,  fungal,  viral,  algae,  and  other  unfriendly  pathogens  out  of  aquarium  water.  It  does  nothing  for  TDS.
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